Program Information

	Therapy General Poster Discussion	Sunday - 7/12/2015
		3:00 PM - 6:00 PM	Room: Exhibit Hall

Sunday SU-E-T-1

(In)dependence of Plan Quality On Treatment Modalities and Target-To-Critical Structure Geometry for Brain Tumor D. Ruan*, W. Shao, D. Low, P. Kupelian, S. Qi

Sunday SU-E-T-2

90Y Microspheres Dosimetry Calculation with Voxel-S-Value Method: A Simple Use in the Clinic F. Mañeru*, A. Otal, M. Gracia, N. Gallardo, J. Olasolo, N. Fuentemilla, L. Bragado, M. Martin-Albina, S. Lozares, S. Pellejero, S. Miquelez, A. Rubio

Sunday SU-E-T-3

3 Year Clinical Experience with the IBA Proton Eyeline E. Kryck*, M. Mamalui-Hunter, Z. Li, r. slopsema

Sunday SU-E-T-4

3D Dose Based Patient Compensator QA Procedure for Proton Radiotherapy J. Zou*, M. Reyhan, M. Zhang, R. Davis, S. Jabbour, A. Khan, N. Yue

Sunday SU-E-T-5

4D Measurement-Guided Dose Reconstruction (4D-MGDR) in End-End Quality Assurance (E2E QA) for Assessing Safety Margin in Radiosurgery (SRS) From Clinical Perspectives M. Chan*, R. Leung, M. Wong, V. Lee, G. Law, K. Lee, S. Tung, O. Blanck

Sunday SU-E-T-6

4D Particle Swarm Optimization to Enable Lung SBRT in Patients with Central And/or Large Tumors A. Modiri*, X. Gu, A. Hagan, A. Sawant

Sunday SU-E-T-7

4DCT Robust Optimization for Esophageal Cancer Using Intensity Modulated Proton Therapy L. Liao*, J. Yu, Y. Li, X. Zhu, H. Li, G. Lim, X. Zhang

Sunday SU-E-T-8

A Beam Source Model for Monte Carlo Simulations of a Double-Scattering Proton Beam Delivery System Using Beam Current Modulation J. Shin*, T. Merchant, S. Lee, Z. Li, D. Shin, J. Farr

Sunday SU-E-T-9

A Clinical Implementation and Optimized Dosimetry Study of Freiberg Flap Skin Surface Treatment in High Dose Rate Brachytherapy J. Syh*, J. Syh, B. Patel, H. Wu, M. Durci

Sunday SU-E-T-10

A Clinical Implementation and the Dosimetric Evidence in High Dose Rate Vaginal Multichannel Applicator Brachytherapy J. Syh*, J. Syh, B. Patel, J. Zhang, H. Wu, L. Rosen

Sunday SU-E-T-11

A Cloud Based CT and LINAC QA Data Management System R. Wiersma*, Z. Grelewicz, A. Belcher, X. Liu

Sunday SU-E-T-12

A Comparative Dosimetric Study of Pre and Post Prostate Iodine-125 Permanent Seed Implants X. Liu*, J. Rahimian, B. Goy, H. Cosmatos, Y. Qian

Sunday SU-E-T-13

A Comparative Dosimetric Study On Radio-Dynamic Therapy for Pelvic Cancer Treatment: Strategies for Bone Marrow Dose and Volume Reduction C. Li*, B. Wang, Z. Dong, W. Ge, L. Xu, C. Ma

Sunday SU-E-T-14

A Comparative Study Between Forward and Inverse Planning in Gamma Knife Radiosurgery for Acoustic Neuroma Tumours N. Gopishankar*, P. Agarwal, R. Bisht, S. Kale, G. Rath, S. Chander, B. Sharma

Sunday SU-E-T-15

A Comparison of COMS and EP917 Eye Plaque Applicators Using Different Radionuclides P. Aryal*, J. Molloy, M. Rivard

Sunday SU-E-T-16

A Comparison of Expected Dwell Times and Dose Variations for N-AMD Patients Treated with An Episcleral Brachytherapy Device R. Hamilton, P. Patel, K. Balaggan, M. Restori, T. Ilginis, M. Drew, M. McGovern, J. Vitali, L. Marsteller*

Sunday SU-E-T-17

A Comparison of Forward and Field in Field Intensity Modulation Radiotherapy Planning for Breast Cancer T. liu*, t. sun, J. Chen, g. zhang

Sunday SU-E-T-18

A Comparison of Planning Techniques for Bilateral Reconstructed Chest Wall Patients Undergoing Whole Breast Irradiation T. Volpe, R. Margiasso, Z. Saleh, L. Kuo, L. Hong, A. Ballangrud, D. Gelblum, M. Zinovoy, J. Deasy, X. Tang*

Sunday SU-E-T-19

A Comparison of the Dosimetric Effects of Brass Mesh and Superflab Boluses J. Irwin*, J. Gong, D. Pavord

Sunday SU-E-T-20

A Correlation Study of 2D and 3D Gamma Passing Rates for Prostate IMRT Plans D. ZHANG*, B. Wang, X. Deng, C. Ma

Sunday SU-E-T-21

A D-D Based Neutron Generator System for Boron Neutron Capture Therapy: A Feasibility Study M. Hsieh*, Y. Liu, L. Nie

Sunday SU-E-T-22

A Deterministic Solver of the Boltzmann-Fokker-Planck Equation for Dose Calculation X. Hong*, H. Paganetti, H. Gao

Sunday SU-E-T-23

A Developing Australian Network for Datamining and Modelling Routine Radiotherapy Clinical Data and Radiomics Information for Rapid Learning and Clinical Decision Support D. Thwaites*, L. Holloway, M. Bailey, S. Barakat, M. Carolan, G. Delaney, M. Field, A. Dekker, T. Lustberg, A. Miller, J. van Soest, S. Vinod, S. Walsh

Sunday SU-E-T-24

A Dose Volume Comparison in Stereotactic Body Radiation Therapy Using Flattened and Un-Flattened Photon Beams S. Pangam*

Sunday SU-E-T-25

A Dosimetric Comparison of Three-Dimension Conformal and Intensity-Modulated Radiation Therapy in Esophageal Cancer N. Gallardo, F. Mañeru*, N. Fuentemilla, J. Olasolo, M. Gracia, S. Pellejero, L. Bragado, S. Lozares, S. Miquelez, M. Martin

Sunday SU-E-T-26

A Dosimetric Comparison of Two Treatment Setups for Lung Stereotactic Body Radiation Therapy (SBRT) Patients D. Lewis*, X. Wang, S. Gao, P. Nitsch, J. Pollard, R. Sadagopan, P. Balter

Sunday SU-E-T-27

A Dosimetric Evaluation of Boney Anatomy Versus Fiducial Marker Alignment for the Treatment of Prostate Cancer Using Scanned Beam Proton Therapy D. Freund*, X. Ding, J. Zhang, L. Rosen, H. Wu

Sunday SU-E-T-28

A Dosimetric Evaluation of IMRT Versus 4 Arc VMAT in the Treatment of Bilateral Head and Neck Cancer Using Concavity Ratio Defined PTVs V. Ulizio*, D. Pearson

Sunday SU-E-T-29

A Dosimetric Study of Volumetric Modulated Arc Therapy with Simultaneous Integrated Boost for Rectal Cancer t. sun*, X. Lin, Y. Yin, T. liu

Sunday SU-E-T-30

A Factor for Converting Dose to a Gold Nanoparticle Mixture to a Biologically-Relevant Dose B. Koger*, C. Kirkby

Sunday SU-E-T-31

A Fast Finite Size Pencil Beam (FSPB) Convolution Algorithm for a New Co-60 Arc Therapy Machine O. Chibani*, A. Eldib, C. Ma

Sunday SU-E-T-32

A Feasibility Study of Independent Dose Verification for IMAT T. Kamima*, R. Takahashi, H. Baba, M. Yamashita, Y. Sugawara, Y. Sato, H. Tachibana

Sunday SU-E-T-33

A Feasibility-Seeking Algorithm Applied to Planning of Intensity Modulated Proton Therapy: A Proof of Principle Study S. Penfold*, M. Casiraghi, T. Dou, R. Schulte, Y. Censor

Sunday SU-E-T-34

A Feasible Action Level System for DVH-Based IMRT QA G. Redler, H. Zhen*

Sunday SU-E-T-35

A General Fill Factor Definition Serving to Characterise the MLC Misalignment Detection Capabilities of Two-Dimensional Detector Arrays T. Stelljes*, H. Looe, D. Harder, B. Poppe

Sunday SU-E-T-36

A GPU-Accelerated Monte-Carlo Dose Calculation Platform and Its Application Toward Validating a ViewRay Beam Model Y. Wang*, T. Mazur, O. Green, Y. Hu, H. Wooten, D. Yang, T. Zhao, S. Mutic, H. Li

Sunday SU-E-T-37

A GPU-Based Pencil Beam Algorithm for Dose Calculations in Proton Radiation Therapy G. Kalantzis*, T. Leventouri, H. Tachibana, C. Shang

Sunday SU-E-T-38

A Head to Head Comparison of Two Commercial Phantoms Used for SRS QA V. Sarkar*, L. Huang, Y. Huang, M. Szegedi, P. Rassiah-Szegedi, H. Zhao, B. Salter

Sunday SU-E-T-39

A Logistic Function-Based Model to Predict Organ-At-Risk (OAR) DVH in IMRT Treatment Planning S. Chen*, H. Zhang, B. Zhang, W. D'Souza

Sunday SU-E-T-40

A Method for Improving Dose Gradient for Robotic Radiosurgery T. Li*, S. Burton, J. Flickinger, D. Heron, M. Huq

Sunday SU-E-T-41

A Method for Performing An In-House Batch Assay of I-125 Seeds Used for Prostate Implants J. Muryn*, D. Wilkinson

Sunday SU-E-T-42

A Method to Determine the Optimal Proton Scanned Beam Angle to Ensure Robust Treatment Planning J. Blanco Kiely*, B. White, S. Both

Sunday SU-E-T-43

A Methodology for Quality Control of IMPT Treatment Plan Based On VMAT Plan S. JIANG*, Y. YANG, L. Liao, X. Wang, H. Li, X. Zhu, X. Zhang

Sunday SU-E-T-44

A Micro-Raman Spectroscopy Study of the Dose-Dependence of EBT3 GafChromicTM Films for Quantifying the Degree of Molecular Polymerization M. Callens*, W. Crijns, V. Simons, I. De Wolf, T. Depuydt, F. Maes, K. Haustermans, J. D'hooge, E. D'Agostino, H. Pfeiffer, K. Van Den Abeele

Sunday SU-E-T-45

A Modified Winston-Lutz Test for Single Isocenter Multiple Targets SRS QA C. Song*, K. Xue, R. Li, T. Xue

Sunday SU-E-T-46

A Monte Carlo Investigation of Radiation Interactions with Gold Nanoparticles in Water for 6 MV, 85 KeV and 40 KeV Photon Beams D. Flint*, D. O'Brien, C. McFadden, T. Hallacy, T. Wolfe, S. Krishnan, G. Sawakuchi

Sunday SU-E-T-47

A Monte Carlo Model of a Spot Scanning Proton Beam Based On a Synchrotron Proton Therapy Accelerator C. Xie*, H. Lin, J. Jing, C. Chen, R. Cao, X. Pei

Sunday SU-E-T-48

A Multi-Institutional Study of Independent Dose Verification for Conventional, SRS and SBRT R. Takahashi*, H. Tachibana, T. Kamima, M. Itano, T. Yamazaki, S. Ishibashi, Y. Higuchi, H. Shimizu, T. Yamamoto, M. Yamashita, H. Baba, Y. Sugawara, A. Sato, S. Nishiyama, D. Kawai, S. Miyaoka

Sunday SU-E-T-49

A Multi-Institutional Study of Independent Dose Verification for IMRT H. Baba*, T. Kamima, R. Takahashi, D. Kawai, Y. Sugawara, T. Yamamoto, A. Sato, M. Yamashita, H. Tachibana

Sunday SU-E-T-50

A Multi-Institutional Study of Independent Dose Verification Software Program for Lung SBRT D. Kawai*, R. Takahashi, T. Kamima, H. Baba, T. Yamamoto, Y. Kubo, S. Ishibashi, Y. Higuchi, H. Takahashi, H. Tachibana

Sunday SU-E-T-51

A National QA Audit of QA Systems Used for IMRT and VMAT Patient QA E. Seravalli, A. Houweling, M. Van Gellekom, J. Kaas, M. Kuik, E. Loeff, T. Raaben, J. De Pooter, W. de Vries, J. Van de Kamer*

Sunday SU-E-T-52

A New Device for Quality Assurance of a Single Isocenter Technique for the Simultaneous Treatment of Multiple Brain Metastases J. Maurer*, B. Sintay, V. Varchena

Sunday SU-E-T-53

A New Method for Characterizing the Stability of the Treatment Couch Isocentre E. Gete*, b. wilson, R. Lee

Sunday SU-E-T-54

A New Method for Optimizing Radiation Isocenter for Linac-Based SRS S. Hancock, S. Hancock*, D. Hyer, E. Nixon

Sunday SU-E-T-55

A Novel Applicator for High Dose Rate Brachytherapy Treatments of Ocular Conjunctiva S. Koren*, D. Bragilovski, A. Guemnie Tafo, G. Cohen

Sunday SU-E-T-56

A Novel Approach to Computing Expected Value and Variance of Point Dose From Non-Gated Radiotherapy Delivery S. Zhou*, X. Zhu, M. Zhang, D. Zheng, Q. Zhang, Y. Lei, S. Li, J. Driewer, S. Wang, C. Enke

Sunday SU-E-T-57

A Novel Method to Improve Dose Heterogeneity of Target and Organs at Risk Sparing in the Intensity-Modulated Radiotherapy for Stage III Lung Cancer B. Huang*, J. Lu

Sunday SU-E-T-58

A Novel Monte Carlo Photon Transport Simulation Scheme and Its Application in Cone Beam CT Projection Simulation Y. Xu*, Z. Tian, L. Zhou, S. Jiang, X. Jia

Sunday SU-E-T-59

A Novel Multi-Beam Dynamic IMRT with Fixed-Jaw Technique for Left Breast Cancer Patients with Regional Lymph Nodes Radiotherapy J. Wang*, Z. Yang, W. Hu

Sunday SU-E-T-60

A Plan Quality Index in IMRT QA That Is Independent of the Acceptance Criteria D. Kim*, S. Kim, S. Kang, T. Kim, K. Kim, S. Park, M. Cho, D. Shin, T. Suh

Sunday SU-E-T-61

A Practical Process for Fabricating Passive Scatter Proton Beam Modulation Compensation Filters Using 3D Printing T. Zhao, R. Drzymala*

Sunday SU-E-T-62

A Preliminary Experience of Using EPID Transit Dosimetry for Monitoring Daily Dose Variations in Radiation Treatment Delivery R. Yao*, W. Chisela

Sunday SU-E-T-63

A Preliminary Study of Gold Nanoparticles Enhanced Cone Beam Computed Tomography K. Chen*, H. Sha, Y. Yang

Sunday SU-E-T-64

A Programmable Moving Insert for the ArcCHECK Phantom for Dose Verification of Respiratory-Gated VMAT S. Gaede*, H. Young, M. Mulligan, K. Jordan

Sunday SU-E-T-65

A Prospective Trial of Open Face Masks for Head and Neck Radiotherapy D. Wiant*, S. Squire, J. Maurer, H. Liu, L. Hayes, B. Sintay

Sunday SU-E-T-66

A Prototype for Couch Based Real-Time Dosimetry in External Beam Radiotherapy P. Ramachandran*

Sunday SU-E-T-67

A Quality Assurance Procedure for VMAT Delivery Technique with Multiple Verification Metric Using TG-119 Protocol Y. Katsuta*, N. Kadoya, E. Shimizu, K. Matsunaga, M. Inoue, K. Majima, K. Jingu

Sunday SU-E-T-68

A Quality Assurance System with a Web Camera for High Dose Rate Brachytherapy Y. UEDA*, A. HIROSE, S. OOHIRA, M. ISONO, K. TSUJII, M. MIYAZAKI, A. MASAOKA, S. INUI, T. HIRATA, Y. KAWAGUCHI, K. KONISHI, T. TESHIMA

Sunday SU-E-T-69

A Radiobiological Investigation of Dose Escalation in Lower Oesophageal Tumours with a Focus On Gastric Toxicity R. Carrington*, J. Staffurth, S. Warren, M. Partridge, E. Spezi, S. Gwynne, M. Hawkins, T. Crosby

Sunday SU-E-T-70

A Radiobiological Model of Reoxygenation and Fractionation Effects M. Guerrero*, D. Carlson

Sunday SU-E-T-71

A Radiochromic Film Based Quantitative Assessment of Thermoplastic Mask Bolus Effect in Head and Neck IMRT/VMAT C. Kalavagunta*, M. Lin, J. Snider, H. Xu, A. Schrum, P. Vadnais, K. Marter, M. Suntharalingam, K. Prado

Sunday SU-E-T-72

A Retrospective Correlation Analysis On Dose-Volume Control Points and Treatment Outcomes A. Roy*, T. Refaat, I. Bacchus, D. Cutright, V. Sathiaseelan, B. Mittal, O. Nohadani

Sunday SU-E-T-73

A Robust Proton Beam Therapy Technique for High-Risk Prostate Cancer Whole Pelvis Irradiation: Bilateral Opposed Single Field Uniform Dose (SFUD) Plan with Lateral Penumbra Gradient Matching X. Ding*, H. Wu, L. Rosen

Sunday SU-E-T-74

A Simple Model of Dose Falloff for Highly Convergent SBRT Beams P. Hoban*, Y. Niu, C. Yu

Sunday SU-E-T-75

A Simple Technique for Proton Beam Range Verification B. Burgdorf*, A. Kassaee, E. Garver

Sunday SU-E-T-76

A Software System to Monitor VMAT Plan Complexity in a Large Radiotherapy Centre S. Arumugam*, A. Xing, P. Vial, D. Thwaites, L. Holloway

Sunday SU-E-T-77

A Statistical Approach to Manage Quality for Pre-Treatment Verification in IMRT/VMAT K. Jassal*, B. Sarkar, B. Mohanti, S. Roy, T. Ganesh, A. Munshi, A. Chougule, K. Sachdev

Sunday SU-E-T-78

A Study of Dose Falloff Gradient in RapidArc Planning of Lung SBRT D. Desai*, S. Srinivasan, H. Elasmar, E. Johnson

Sunday SU-E-T-79

A Study of the Effect of Clinical Tumor Volume Displacement On the Dosage of Post Modified Radical Mastectomy Intensity-Modulated Radiation Therapy Plans for Left-Sided Breast Cancer W. Zhang*, C. Ma, D. Li, F. Wu

Sunday SU-E-T-80

A Study of the Effect of Dose Grid Resolution On Stereotactic Plan Evaluation as a Function of Target Size E. Pappas, N. Papanikolaou*, A. Gutierrez, N. Kirby, P. Mavroidis, E. Efstathopoulos, D. Makris, R. Crownover, S. Stathakis

Sunday SU-E-T-81

A Study On Correlation Between Gamma Analysis for Midline and Lateralized Tumors Using VMAT S. Kumar*, A. PT

Sunday SU-E-T-82

A Study On Enhanced Dynamic Wedge (EDW) Dosimetry Using 2D Seven29 Ion Chamber Array Detector S. Kumar*, A. Aparna

Sunday SU-E-T-83

A Study On Evaluating the Directional Dependency of 2D Seven 29 Ion Chamber Array Clinically with Different IMRT Plans S. Kumar*, A. C.P

Sunday SU-E-T-84

A Survey On Radiotherapy Table Tolerances and Couch Overrides of Over 350 Institutions B. Chinsky*, R. Patel, J. Panfil, M. Surucu, J. Roeske

Sunday SU-E-T-85

A Systematic Analysis of Mono-Isocentric Techniques for the Treatment of Multiple Metastasis N. Papanikolaou*, G. Narayanasamy, S. Stathakis, E. Pappas, N. Kirby, P. Mavroidis, R. Crownover, A. Gutierrez

Sunday SU-E-T-86

A Systematic Method for GammaKnife SRS Fetal Dose Estimation S. Geneser*, A. Paulsson, S. Braunstein, P. Sneed, L. Ma

Sunday SU-E-T-87

A TG-100 Approach for Quality Improvement of Associated Dosimetry Equipment R. Manger*, T. Pawlicki, G. Kim

Sunday SU-E-T-88

Acceptance Testing and Commissioning Measurements of a Newly Released InCise™ Multileaf Collimator for CyberKnife M6™ System M. Huq*, C. Ozhasoglu, S. Jang, M. Hwang, D. Heron, R. Lalonde

Sunday SU-E-T-89

Accuracy of Absolute Three-Dimensional Dose Distribution Measurement Using the Delta4 R. Uehara*, H. Tachibana, H. Ohyoshi, S. Matsumoto, H. Baba, F. Tanaka, T. Ariji

Sunday SU-E-T-90

Accuracy of Calibration of Lithium-6 and -7 Enriched LiF TLDs for Neutron Measurements in High Energy Radiotherapy S. Keehan*, R. Franich, M. Taylor, P. Lonski, T. Kron

Sunday SU-E-T-91

Accuracy of Dose Calculation Algorithms for Patients Undergoing Stereotactic Ablative Radiotherapy A. Tajaldeen*, P. Ramachandran, M. Geso

Sunday SU-E-T-92

Achieving Desirable Lung Doses in Total Body Irradiation Based On in Vivo Dosimetry and Custom Tissue Compensation G. Cui*, A. Shiu, S. Zhou, J. Cui, L. Ballas

Sunday SU-E-T-93

Activation of Psoralen at Depth Using Kilovoltage X-Rays: Physics Considerations in Implementing a New Teletherapy Paradigm J. Adamson*, M. Nolan, T. Gieger, H. Walder, P. Yoon, Z. Fathi, W. Beyer, L. Liu, D. Alcorta, N. Spector, M. Oldham

Sunday SU-E-T-94

An Advanced Rotating Gamma Ray System for Stereotactic Radiosurgery C. Ma*, O. Chibani, G. Mora, J. Li, L. Chen

Sunday SU-E-T-95

An Alternative Option for Reducing Lung Dose for Electron Scar Boost Irradiation in Post-Mastectomy Breast Cancer Patients with a Thin Chest Wall Y. Lee*, P. Kumar, M. Mitchell

Sunday SU-E-T-96

An Analysis of VMAT SBRT Lung Treatment Plans D. Wilson*, J. James, B. Wang, N. Dunlap, S. Woo, C. Silverman, A. Dragun, M. El-Ghamry

Sunday SU-E-T-97

An Analysis of Knowledge Based Planning for Stereotactic Body Radiation Therapy of the Spine J. Foy*, R. Marsh, D. Owen, M. Matuszak

Sunday SU-E-T-98

An Analysis of TG-51 Electron Beam Calibration Correction Factor Uncertainty P. Lee, P. Alvarez, P. Taylor, J. Lowenstein, A. Molineu, S. Kry, D. Followill*

Sunday SU-E-T-99

An Analysis of the Accuracy of TPS Extrapolation of Commissioning Data H. Alkhatib*, S. Oves, W. Gebreamlak, D. Mihailidis

Sunday SU-E-T-100

An Approach to Improving the Dynamic Delivery Accuracy for Breast IMRT G. Grigorov, J. Darko*, M. Kitor, R. Redekop, E. Osei

Sunday SU-E-T-101

An Arc Based Treatment Technique for Proton PBS Beam Utilizing Overlaid Bragg Peak Spots B. Wang*

Sunday SU-E-T-102

An Efficient Method to Quantitatively Detect Sub-Millimeter MLC Bank Alignment Errors Using a Well-Known QA Device A. Nguyen*, K. Patton, T. Paul, W. Duggar, C. Yang

Sunday SU-E-T-103

An Evaluation of Multiple Irradiations of the IROC Houston QA Center Anthropomorphic Liver Phantom P. Alvarez*, A. Molineu, C. Lujano, T. Nguyen, D. Followill

Sunday SU-E-T-104

An Examination of Dose in the Buildup and Build-Down Regions W. Tome, H. Kuo, J. Phillips*

Sunday SU-E-T-105

An FMEA Survey of Intensity Modulated Radiation Therapy (IMRT) Step and Shoot Dose Delivery Failure Modes J. Faught*, J. Johnson, F. Stingo, S. Kry, L. Court, P. Balter, D. Followill

Sunday SU-E-T-106

An Institutional Review of Using Commercially Available Software to Evaluate Treatment Plan Quality for Various Treatment Sites and Beam Deliveries C. Esquivel*, L. Patton, S. Walker, S. Lawson

Sunday SU-E-T-107

An Investigation Into Attenuation Effects On the Energy Spectrum for 137Cs Using Monte Carlo Techniques S. Taneja*, L. Bartol, W. Culberson, L. DeWerd

Sunday SU-E-T-108

An Investigation of Cerenkov Light Production in the Exradin W1 Scintillator Under Various Measurement Conditions E. Simiele*, W. Culberson

Sunday SU-E-T-109

An Investigation of Including Variable Relative Biological Effectiveness in Intensity Modulated Proton Therapy Planning Optimization for Head and Neck Cancer Patients W. Cao, M. Zaghian*, K. Randeniya, G. Lim, U. Titt, R. Mohan

Sunday SU-E-T-110

An Investigation On Monitor Unit Threshold and Effects On IMPT Delivery in Proton Pencil Beam Planning System J. Syh*, X. Ding, J. Syh, B. Patel, L. Rosen, H. Wu

Sunday SU-E-T-111

An Iterative Approach to Modelling Dosimetric Properties of a Varian MLC D. DiCostanzo*

Sunday SU-E-T-112

An OpenCL-Based Cross-Platform Monte Carlo Dose Engine (oclMC) for Coupled Photon-Electron Transport Z. Tian*, F. Shi, M. Folkerts, N. Qin, S. Jiang, X. Jia

Sunday SU-E-T-113

An Unified Imaging and Robotic Couch Quality Assurance Procedure and Automation Software E. Schreibmann*, E. Elder

Sunday SU-E-T-114

Analysis of MLC Errors On Gamma Pass Rates for Patient-Specific and Conventional Phantoms D. Sterling*, E. Ehler

Sunday SU-E-T-115

Analysis of Patient Specific QA for VMAT by Disease Site and Planning-Delivery System Using the ScandiDos Delta4 Phantom T. Giaddui*, M. Hardin, J. Keller, E. Kremmel, M. Fu, C. Peng, L. Doyle, Y. Yu, Y. Xiao, A. Harrison

Sunday SU-E-T-116

Analysis of Patient Specific VMAT QA Passing Rates with Delta4 for Matched Machines J. Keller*, M. Hardin, T. Giaddui, E. Kremmel, C. Peng, L. Doyle, Y. Yu, A. Harrison

Sunday SU-E-T-117

Analysis of the ArcCHECK Dosimetry Gamma Failure Using the 3DVH System S. Cho*, W. Choi, H. Lee, J. Yoon, E. Lee, K. Park, K. Keum

Sunday SU-E-T-118

Analysis of Variability and Stability Between Two Water Tank Phantoms Utilizing Water Tank Commissioning Procedures J. Roring*, D. Saenz, W. Cruz, N. Papanikolaou, S. Stathakis

Sunday SU-E-T-119

Analysis the Efficacy of Different Radiotherapy Methods and Failure Mode in No-Metastasis Esophageal Squamous Cell Carcinoma C. Yankun, T. Zhihui*, L. Runxiao, W. Shen

Sunday SU-E-T-120

Analytic Dose Verification for Patient-Specific Proton Pencil Beam Scanning Plans C. Chang*, D. Mah

Sunday SU-E-T-121

Analyzing the Broadening Effect On the Bragg Peak Due to Heterogeneous Geometries and Implementing User-Routines in the Monte-Carlo Code FLUKA in Order to Reduce Computation Time K. Baumann, U. Weber, Y. Simeonov, K. Zink*

Sunday SU-E-T-122

Anisotropic Analytical Algorithm (AAA) Vs. Acuros XB (AXB) in Stereotactic Treatment Planning D. Mynampati*, H. Kuo, R. Yaparpalvi, P. Godoy Scripes, W. Tome

Sunday SU-E-T-123

Anomalous Altitude Effect in Permanent Implant Brachytherapy Seeds E. Watt*, D. Spencer, T. Meyer

Sunday SU-E-T-124

Anthropomorphic Phantoms for Confirmation of Linear Accelerator Based Small Animal Irradiation J. Perks*, S. Lucero, S. Benedict

Sunday SU-E-T-125

Application of Jaw-Tracking Function in VMAT for Upper Thoracic Esophageal Cancer W. Zhang*, J. Chen, T. zhai, L. Yan, C. Chen

Sunday SU-E-T-126

Application of PIPSpro and EPID for Quality Assurance of Medical Accelerators Z. Lin*, X. Peng, J. Lu

Sunday SU-E-T-127

Application of TG-119 for Evaluation of Proton Spot Scanning Based Planning and Treatment Delivery J. Saini*, N. Cao, S. Bowen, C. Bloch, T. Wong

Sunday SU-E-T-128

Applying Failure Modes and Effects Analysis to a Risk-Based Quality Management for Stereotactic Radiosurgery in Brazil F. Teixeira*, C. de Almeida, M. Huq

Sunday SU-E-T-129

Are Knowledge-Based Planning Dose Estimates Valid for Distensible Organs? R. Lalonde*, D. Heron, A. Readshaw, M. Huq

Sunday SU-E-T-130

Are Proton Gantries Needed? An Analysis of 4332 Patient Proton Gantry Treatment Plans From the Past 10 Years S. Yan*, H. Lu, J. Flanz, N. Depauw, J. Adams, B. Gorissen, Y. Wang, J. Daartz, T. Bortfeld

Sunday SU-E-T-131

Artificial Neural Networks Applied to Overall Survival Prediction for Patients with Periampullary Carcinoma Y. Gong*, J. Yu, V. Yeung, J. Palmer, Y. Yu, B. Lu, L. Babinsky, R. Burkhart, B. Leiby, V. Siow, H. Lavu, E. Rosato, J. Winter, N. Lewis, A. Sama, E. Mitchell, P. Anne, M. Hurwitz, C. Yeo, V. Bar-Ad, Y. Xiao

Sunday SU-E-T-132

Assess the Shielding of Secondary Neutrons From Patient Collimator in Proton Therapy Considering Secondary Photons Generated in the Shielding Process with Monte Carlo Simulation M. Yamanaka*, m. takashina, k. kurosu, V. Moskvin, I. Das, m. koizumi

Sunday SU-E-T-133

Assessing IMRT Treatment Delivery Accuracy and Consistency On a Varian TrueBeam Using the SunNuclear PerFraction EPID Dosimetry Software S. Dieterich*, E. Trestrail, R. Holt, S. Saini, I. Pfeiffer, M. Kent, K. Hansen

Sunday SU-E-T-134

Assessing the Capabilities of An MU Model for Fields as Small as 2cm in a Passively Scattered Proton Beam R. Simpson*, A. Ghebremedhin, I. Gordon, B. Patyal

Sunday SU-E-T-135

Assessing the Clinical Impact of Approximations in Analytical Dose Calculations for Proton Therapy J. Schuemann*, D. Giantsoudi, C. Grassberger, H. Paganetti

Sunday SU-E-T-136

Assessment of Seasonal Linear Accelerator Output Variations and Associated Impacts S. Bartolac*, D. Letourneau

Sunday SU-E-T-137

Attenuation of Carbon Fiber IGRT Couch Top for SBRT By Using a MapCheck 2 and Ion Chamber K. Dou*

Sunday SU-E-T-138

Automated Chart Review Module Including Cross-Vendor Data Transfer Verification Developed for IHE-RO Initiative M. Brewer*, C. Gordon, C. Tien

Sunday SU-E-T-139

Automated Daily EPID Exit Dose Analysis Uncovers Treatment Variations A. Olch*

Sunday SU-E-T-140

Automated Daily Patient Treatment Chart Checks Using Data Mining System A. Dhabaan*, X. Jiang, E. Schreibmann, E. Elder

Sunday SU-E-T-141

Automated Dose Point Placement for Cervical Cancer Brachytherapy Using Tandem and Ovoid Applicators H. Kang*, L. Padilla, Y. Hasan, H. Al-Hallaq

Sunday SU-E-T-142

Automatic Linac Log File: Analysis and Reporting M. Gainey*, T. Rothe

Sunday SU-E-T-143

Automatic PBS Treatment Planning for Prostate Cancer J. Zhang*, M. Durci, H. Wu, L. Rosen, X. Ding

Sunday SU-E-T-144

Bayesian Inference of Local Relapse Data Using a Poisson-Based Tumour Control Probability Model D. La Russa*

Sunday SU-E-T-145

Beam Characteristics of Flattening Filter Free Beams Including Low Dose Rate Setting K. Uehara*, T. Ogata, M. Nakayama, T. Shinji, H. Nishimura, T. Masutani, T. Ishihara, Y. Ejima, R. Sasaki

Sunday SU-E-T-146

Beam Energy Spread Estimate Based On Bragg Peak Measurement V. Anferov, V. Derenchuk*, R. Moore, A. Schreuder

Sunday SU-E-T-147

Beam Specific Planning Target Volumes Incorporating 4DCT for Pencil Beam Scanning Proton Therapy of Thoracic Tumors L. Lin, M. Kang, S. Huang*, R. Mayer, A. Thomas, J. McDonough, T. Solberg, C. Simone

Sunday SU-E-T-148

Benchmarks and Pre-Treatment Reviews: A Study of Quality Assurance Effectiveness J. Lowenstein*, H. Nguyen, J. Roll, A. Walsh, A. Tailor, D. Followill

Sunday SU-E-T-149

Brachytherapy Patient Specific Quality Assurance for a HDR Vaginal Cylinder Case J. Barbiere*, J. Napoli, A. Ndlovu

Sunday SU-E-T-150

Brachytherapy QA Employing a High Resolution Liquid Filled Ionisation Chamber Array: Initial Experience and Limitations M. Gainey*, M. Kollefrath, G. Bruggmoser

Sunday SU-E-T-151

Breathing Synchronized Delivery (BSD) Planning for RapicArc Treatment W. Lu*, M. Chen, S. Jiang

Sunday SU-E-T-152

Building An Ultrafast, Earthquake Proof Treatment Planning System K. Bush*, J. Freeman, B. Zavalkovskiy

Sunday SU-E-T-153

Burst-Mode Modulated Arc Therapy with Flattening-Filter-Free Beams Versus Flattening-Filtered Beams K. Kainz*, C. Lawton, X. Li

Sunday SU-E-T-154

Calculation of Tissue Dose Point Kernels Using GATE Monte Carlo Simulation Toolkit to Compare with Water Dose Point Kernel m. khazaee*, A. Kamali Asl, P. Geramifar

Sunday SU-E-T-155

Calibration of Variable Longitudinal Strength 103Pd Brachytherapy Sources J. Reed*, J. Radtke, J. Micka, W. Culberson, L. DeWerd

Sunday SU-E-T-156

Can Sr-90 Check Sources Replace Co-60 Measurements for Monitoring of Reference Chamber Stability? M. McEwen*, N. Miksys, D. Niven

Sunday SU-E-T-157

CARMEN: A MatLab-Based Research Platform for Monte Carlo Treatment Planning (MCTP) and Customized System for Planning Evaluation J. Baeza*, A. Ureba, E. Jiménez-Ortega, A. Barbeiro, J. Lagares, A. Leal Plaza

Sunday SU-E-T-158

Catching Errors with Trajectory Log Files K. Wijesooriya*, K. Seitter, V. Desai, I. Dharia, P. Read, J. Larner

Sunday SU-E-T-159

Characteristics of Fiber-Optic Radiation Sensor for Proton Therapeutic Beam J. Son*, M. Kim, U. Hwang, J. Park, Y. Lim, S. Lee, S. Park, M. Yoon, D. Shin

Sunday SU-E-T-160

Characterization and Monitoring of Linear Accelerator Gantry Radiation Isocenter Motion D. Letourneau*, N. Amin, K. Wang, B. Norrlinger, D. Jaffray, A. McNiven

Sunday SU-E-T-161

Characterization and Validation of CT Simulator Hounsfield Units to Relative Stopping Power Values for Proton Treatment Planning E. Schnell*, S. Ahmad, T. De La Fuente Herman

Sunday SU-E-T-162

Characterization of a New Oblong Cone for Use with the Intraoperative Mobetron Unit J. Cantley*, V. Colussi

Sunday SU-E-T-163

Characterization of a Novel High Resolution 1D Silicon Monolithic Array for Small Field Commissioning and Quality Assurance F. Bisello*, J. McGlade, P. Wang, J. Kralik, P. Kosterin, R. Mooij, D. Menichelli, J. Celi, T. Solberg

Sunday SU-E-T-164

Characterization of Breast Deformation During Accuboost TM Treatment J. Garcia-Cobian*, F. Liu

Sunday SU-E-T-165

Characterization of Dose Distributions in High-Dose-Rate Surface Brachytherapy I. Buzurovic*, J. Hansen, M. Bhagwat, D. O'Farrell, A. Damato, S. Friesen, P. Devlin, R. Cormack

Sunday SU-E-T-166

Characterization of Efficiency and Plan Quality for the FFF Beams On Various Anatomical Sites P. Rassiah-Szegedi*, M. Szegedi, V. Sarkar, H. Zhao, Y. Huang, L. Huang, B. Salter

Sunday SU-E-T-167

Characterization of In-House Plastic Scintillator Detectors Array for Radiation Therapy T. Zhu, H. Liu*, A. Dimofte, A. Darafsheh, H. Lin, A. Kassaee, J. Finlay, S. Both

Sunday SU-E-T-168

Characterization of Neutrons From the TrueBeam Treatment Head D. Sawkey*, M. Svatos

Sunday SU-E-T-169

Characterization of Pacemaker/ICD Dose in SAVI HDR Brachytherapy C. Kalavagunta*, G. Lasio, B. Yi, J. Zhou, M. Lin

Sunday SU-E-T-170

Characterization of the Location, Extent, and Proximity to Critical Structures of Target Volumes Provides Detail for Improved Outcome Predictions Among Pancreatic Cancer Patients Z. Cheng*, J. Moore, L. Rosati, O. Mian, A. Narang, J. Herman, T. McNutt

Sunday SU-E-T-171

Characterization of the New Xoft Axxent Electronic Brachytherapy Source Using PRESAGE Dosimeters A. Steinmann*, J. Adamovics, D. Followill, G. Ibbott

Sunday SU-E-T-172

Characterization of TLD-100 (LiF:Mg,Ti) Microcube Energy Response in a Cylindrical Chamber Phantom V. Desai*, C. Hammer, K. Kunugi, W. Culberson, L. DeWerd

Sunday SU-E-T-173

Clinical Comparison of Treatment Plans and Fallback Plans for Machine Downtime W. Cruz*, P. Papanikolaou, P. Mavroidis, S. Stathakis

Sunday SU-E-T-175

Clinical Evaluations of Monte Carlo-Based Inverse Treatment Plan Optimization for Intensity Modulated Radiotherapy y. chi*, Y. Li, Z. Tian, X. Gu, S. Jiang, X. Jia

Sunday SU-E-T-176

Clinical Experience of Brass Mesh Bolus: Patient-Specific Parameters as Predictors of Measured Dosimetric Effect A. Yock*, R. Manger, J. Einck, C. Yashar, P. Sanghvi, J. Hattangadi-Gluth, L. Cervino

Sunday SU-E-T-177

Clinical Experience with Spirometer Guided Breath Hold Lung SBRT H. Liu, M. Manning, B. Sintay, J. Maurer, L. Hayes, D. Wiant*

Sunday SU-E-T-178

Clinical Feasibility of Multi-Leaf Collimator Based Dynamic Wedge C. Jeong*, J. Kwak, S. Ahn, J. Kim, J. Park, S. Yoon, B. Cho

Sunday SU-E-T-179

Clinical Impact of IMRT Failure Modes at Or Near TG-142 Tolerance Criteria Levels J. Faught*, P. Balter, J. Johnson, S. Kry, L. Court, F. Stingo, D. Followill

Sunday SU-E-T-180

Clinical Implementation of Hybrid Density Override Planning for Lung SBRT H. Siddique, B. Sintay, J. Maurer, H. Liu, L. Hayes, D. Wiant*

Sunday SU-E-T-181

Clinical Implementation of Task Group 176 B. Burgdorf*, C. Yeager, F. Zhou, C. Hand

Sunday SU-E-T-182

Clinical Implementation of TG71-Based Electron MU Calculation and Comparison with a Commercial Secondary Calculation H. Xu*, M. Guerrero, X. Yang, S. Chen, K. Langen, K. Prado, C. Schinkel

Sunday SU-E-T-183

Clinical Quality Assurance Workflow for Dynamic Tumor Tracking Radiation Dose Delivery M. Mamalui-Hunter*, Z. Su, Z. Li

Sunday SU-E-T-184

Clinical VMAT QA Practice Using LINAC Delivery Log Files H. Johnston*, T. Jacobson, X. Gu, S. Jiang, S. Stojadinovic

Sunday SU-E-T-185

Clinically-Relevant Investigation of Flattening Filter Free Skin Dose C. Guy*, K. Karki, M. Sharma, S. Kim

Sunday SU-E-T-186

Cloud-Based Quality Assurance Application for Linear Accelerator Commissioning J. Rogers*

Sunday SU-E-T-187

Collimation Methods in Spot Scanning Proton Therapy: A Treatment Plan Comparison Between a Fixed Aperture and a Dynamic Collimation System B. Smith*, E. Gelover, D. Wang, A. Moignier, R. Flynn, L. Lin, M. Kirk, T. Solberg, D. Hyer

Sunday SU-E-T-188

Commission of World 1st Commercial Compact PBS Proton System X. Ding*, B. Patel, X. Song, J. Syh, J. Syh, J. Zhang, D. Freund, L. Rosen, H. Wu

Sunday SU-E-T-189

Commission Range Shifter On a Spot Scanning Proton System Using Raystation Treatment Planning System X. Ding*, L. Rosen, H. Wu

Sunday SU-E-T-190

Commissioning An Elekta VersaHD Linear Accelerator G. Narayanasamy*, D. Saenz, W. Cruz, P. Mavroidis, N. Papanikolaou, S. Stathakis

Sunday SU-E-T-191

Commissioning and Dosimetric Characteristics of Elekta Agility for Total Skin Electron Beam (TSEB) Therapy E. Sayler*, P. Charpentier, B. Micaily, C. Miyamoto, S. Li

Sunday SU-E-T-192

Commissioning of a Commercial 3D Dose Calculation Program K. Langen*, M. Guerrero, M. Killefer, H. Xu, J. Zhou, B. Zhang, S. Chen

Sunday SU-E-T-193

Commissioning of An IntraOp Mobetron S. Grzetic*, J. Hessler, M. Carlson

Sunday SU-E-T-194

Commissioning of Monaco Treatment Planning System On An Elekta VersaHD Linear Accelerator G. Narayanasamy*, c. Bosse, D. Saenz, W. Cruz, P. Mavroidis, N. Papanikolaou, S. Stathakis

Sunday SU-E-T-195

Commissioning the Neutron Production of a Varian TrueBeam Linac L. Irazola*, L. Brualla, J. Rosello, J. Terron, B. SANCHEZ-NIETO, R. Bedogni, F. Sanchez-Doblado

Sunday SU-E-T-196

Comparative Analysis of Surface Dose Measurements Using MOSFET Detector and Dose Predicted by Eclipse - AAA with Varying Dose Calculation Grid Size R. Badkul*, S. Nejaiman, D. Pokhrel, H. Jiang, P. Kumar

Sunday SU-E-T-197

Comparing Quality Assurance Strategies for Single Isocenter Treatments of Multiple Brain Metastases J. Maurer*, H. Liu, D. Wiant, K. Koch, M. Manning, B. Sintay

Sunday SU-E-T-198

Comparison Between a PTW MicroDiamond Dosimeter and a Markus Chamber in a 62 MeV/n Carbon Ion Beam S. Rossomme*, J. Hopfgartner, A. Delor, S. Vynckier, H. Palmans

Sunday SU-E-T-199

Comparison Between Acuros XB and AAA in Homogeneous Phantoms for Volumetric Modulated Arc Therapy Plans J. Lu*, B. Huang, J. Zhang

Sunday SU-E-T-200

Comparison Between HybridARC and Sliding Windows IMRT for Spine SBRT Tumors C. Venencia*, N. Vacca, E. Garrigo, L. Caussa

Sunday SU-E-T-201

Comparison Between Two Immobilization Systems for Cranial Stereotactic Radiosurgery Using The ExacTrac Image-Guidance System L. Nedialkova*, J. Ostenson, A. Sabbas, F. Kulidzhanov, G. Wernicke, S. Trichter

Sunday SU-E-T-202

Comparison of 4D-Measurement-Guided Dose Reconstructions (MGDR) with COMPASS and OCTAVIUS 4D System R. Leung*, M. Wong, O. Blanck, V. Lee, G. Law, K. Lee, S. Tung, M. Chan

Sunday SU-E-T-203

Comparison of a Commercial MRI-Linear Accelerator Based Monte Carlo Dose Calculation Algorithm and Geant4 S. Ahmad*, A. Sarfehnia, M. Paudel, A. Sahgal, S. Hissoiny, B. Keller

Sunday SU-E-T-204

Comparison of Absorbed-Dose to Water in High-Energy Photon Beams Based On Addendum AAPM TG-51, IAEA TRS-398, and JSMP 12 N. Kinoshita*, H. Oguchi, A. Kita, C. Chie Yoshioka, K. Sasamoto, Y. Yasuhiro Nishimoto, T. Adachi, H. Shioura, H. Kimura

Sunday SU-E-T-205

Comparison of Dose-Volume and Dose-Mass 4D Inverse Optimization in NSCLC I. Mihaylov*, E. Moros

Sunday SU-E-T-206

Comparison of EBT and EBT3 RadioChromic Films in Radiation Field of Parotid Cancer Radiotherapy T. Bahreyni Toosi, F. Khorshidi Mianaei, M. Ghorbani, N. Mohammadian Khabbaz Kazemi, M. Mohammadi, A. Meigooni*

Sunday SU-E-T-207

Comparison of Integrated Tissue Air Ratio (ITAR) to Traditional TAR for Kilovoltage Pencil-Beams J. Hanlon*, I. Koruga, E. Chell, R. Pintaske

Sunday SU-E-T-208

Comparison of MR Image Quality of Various Brachytherapy Applicators for Cervical Cancer A. Soliman*, A. Elzibak, A. Fatemi, H. Safigholi, D. Han, E. Leung, A. Ravi, W. Song

Sunday SU-E-T-209

Comparison of Plan Quality Between Arm Avoidance (AA) Vs. Non Arm Avoidance VMAT Planning Techniques for Breast Cancer Patients with Bilateral Implant Reconstructions Receiving Postmastectomy Radiation L. Kuo*, A. Ballangrud, A. Ho, J. Mechalakos, G. Li, L. Hong

Sunday SU-E-T-210

Comparison of Proton with Electron Boost in Breast Cancer Treatment Y. Zheng*, Y. Liu, A. Chang

Sunday SU-E-T-211

Comparison of Seven New TrueBeam Linacs with Enhanced Beam Data Conformance Using a Beam Comparison Software Tool S. Grzetic*, J. Hessler, N. Gupta, J. Woollard, D. DiCostanzo, A. Ayan, M. Carlson

Sunday SU-E-T-212

Comparison of TG-43 Dosimetric Parameters of Low and High Energy Brachytherapy Sources Obtained by MCNP Code Versions of 4C, X and 5 M. Zehtabian, N. Zaker, S. Sina, A. Meigooni*

Sunday SU-E-T-213

Comparison of Treatment Efficiency of Gamma Knife SRS Plans for Brain Metastases with Different Planning Methods Y. Feng*, Z. Huang, S. Lo, N. Mayr, W. Yuh

Sunday SU-E-T-214

Comparison of Treatment Techniques for Dupuytren's Contracture and Risk Assessment of Normal Tissue Complications L. Arentsen*, Z. Lopater, K. Dusenbery, B. Gerbi

Sunday SU-E-T-215

Comparison of VMAT-SABR Treatment Plans with Flattened Filter (FF) Beam and Flattening Filter-Free (FFF) Beam for Localized Prostate Cancer J. Chung*, J. Kim, S. Kang, T. Suh

Sunday SU-E-T-216

Comparison of Volumetrically Modulated Arc Therapy Treatment Using Flattening Filter Free Beams Vs. Flattened Beams for Partial Brain Irradiation S. Yu*, D. Roa, N. Hanna, V. Sehgal, H. Farol, J. kuo, P. Daroui, N. Ramsinghani, M. Al-Ghazi

Sunday SU-E-T-217

Comprehensive Dosimetric Evaluation On 3D-CRT, IMRT and Non-Coplanar Arc Treatment for Prone Accelerated Partial Breast Irradiation (APBI) T. Chiu*, Y. Yan, E. Ramirez, P. Lee, S. Jiang, X. Gu

Sunday SU-E-T-218

Comprehensive Plan Integrity and Quality Check by Accessing Eclipse Planning Data Remotely Via a Novel Eclipse-API Client-Server Interface D. Yang*, Y. Wu, G. He, X. Chang, L. Olsen, S. Mutic

Sunday SU-E-T-219

Comprehensive Validation of the Electron Monte Carlo Dose Calculation Algorithm in RayStation Treatment Planning System for An Elekta Linear Accelerator with AgilityTM Treatment Head Y. Wang*, Y. Park, K. Doppke

Sunday SU-E-T-220

Computational Accuracy of Adaptive Convolution (AC) and Collapsed Cone Convolution (CCC) Algorithms in the Presence of Air Gaps S. Oyewale*, . Pokharel, S. Rana

Sunday SU-E-T-221

Computational Evaluation of Proton Induced Gain in a Portable Faraday Cup S. Marshall*, A. Hodgdon, B. Currier

Sunday SU-E-T-222

Computational Optimization of Monte Carlo Simulation On 4D Treatment Planning Using the Cloud Computing Technology J. Chow*

Sunday SU-E-T-223

Computed Radiography Dose Measurements of External Radiotherapy Beams C. Aberle*, R. Kapsch

Sunday SU-E-T-224

Considerations for the Proper Treatment of Multiple Cranial Metastases with Single Isocenter Volumetric Modulated Arc Therapy C. Audet*, B. Poffenbarger, A. Hwang

Sunday SU-E-T-225

Correction Matrix for PinPoint Ionization Chamber for Dosimetric Measurements in the Newly Released Incise™ Multileaf Collimator Shaped Small Field for CyberKnife M6™ Machine Y. Zhang*, T. Li, D. Heron, M. Huq

Sunday SU-E-T-226

Correction of a Standard Model-Based Dose Calculator Using Measurement Data M. Chen*, S. Jiang, W. Lu

Sunday SU-E-T-227

Could the Alpha/Beta Ratio Change in a Strong Magnetic Field? G. Pang*

Sunday SU-E-T-228

Coupling Database Search with Atlas-Based Segmentation: Application to Esophageal Delineation E. Schreibmann*, E. Elder

Sunday SU-E-T-229

Craniospinal Radiotherapy Planning with VMAT, Two First Years Experience F. LLISO*, V. Carmona, J. Gimeno, C. Candela-Juan, J. Bautista, J. Richart, J. Perez-Calatayud

Sunday SU-E-T-230

Creating a Large Number of Focused Beams with Variable Patient Head Tilt to Improve Dose Fall-Off for Brain Radiosurgery J. Chiu*, L. Ma

Sunday SU-E-T-231

Cross-Validation of 3D Gamma Comparison Tools K. Alexander*, C. Jechel, C. Pinter, G. Salomons, A. Lasso, G. Fichtinger, L. Schreiner

Sunday SU-E-T-232

Custom High-Dose-Rate Brachytherapy Surface Mold Applicators: The Importance Source to Skin Distance S. Park*, J. Demanes, M. Kamrava

Sunday SU-E-T-233

Cyberknife Versus Linac IMRT for Dose Comparision in Hypofractionated Hemi Larynx Irradiation of Early Stage True Vocal Cord Cancer: A Dosimetric Study C. Ding*, P. Lee, S. Jiang

Sunday SU-E-T-234

Daily Quality Assurance for a Six Degrees of Freedom Couch Using a Novel Phantom K. Woods*, J. Woollard, A. Ayan, A. Sandu, J. Sommerfeld, A. Laurel, N. Gupta

Sunday SU-E-T-235

Data Mining for Evaluating Treatment Performances Over a Large Quantity of Data to Monitor and Improve SBRT Workflow W. Feng*, A. Chu, C. Wuu, K. Nguyen

Sunday SU-E-T-237

Deformable Image Registration and Deformed Dose Composite for Volumetric Evaluation of Multimodal Gynecological Cancer Treatments D. Albani*, J. Cantley, T. Sherertz, R. Ellis, K. Herrmann, T. Podder

Sunday SU-E-T-238

Deriving Electron Contamination Spectra From Pure and Clinical Photon Beams C. Smit*, F. du Plessis

Sunday SU-E-T-239

Design and Evaluation of a Nozzle Shielding System in Passively Scattered Proton Therapy A. Wroe*, G. McAuley, J. Slater

Sunday SU-E-T-240

Design and Implement of An Electronic Records Function for Treatment Plan Checked Meeting Q. Wu*

Sunday SU-E-T-241

Design and Implement of An Information Management System for Radiation Workers in a Hospital Q. Wu*, M. Wu

Sunday SU-E-T-242

Design of a Novel Afterloader Clearance QA Device for Biliary HDR Therapy J. Mullins*, C. Deufel

Sunday SU-E-T-243

Design of a Novel Testing Port for Radiation Protection and Shielding Measurements S. Tanny*, D. Harrell, M. Chopra, J. Noller, E. Parsai

Sunday SU-E-T-244

Designing Low-Z Targets To Enhance Surface Dose: A Monte Carlo Simulation R. Kelly*, J. Robar, D. Parsons

Sunday SU-E-T-245

Detection of the Photon Target Damage in Varian Linac Based On Periodical Quality Assurance Measurements S. Gao*, P. Balter, X. Wang, R. Sadagopan, J. Pollard

Sunday SU-E-T-246

Detector Selection for Small Field Measurements, a Comparative Study M. Sigler*, D. Pavord, J. Irwin, S. Kriminski

Sunday SU-E-T-247

Determinations of the Optimal Phase for Respiratory Gated Radiotherapy From Statistical Analysis Using a Visible Guidance System S. Oh*, J. Yea, M. Kang, H. Lee, S. Kim

Sunday SU-E-T-248

Determining Output Factor of Irregular Electron Cutouts at Extended SSD H. Alkhatib*, W. Gebreamlak, D. Tedeschi, D. Mihailidis

Sunday SU-E-T-249

Determining the Sensitivity of Beam Profile Parameters for Detecting Energy Changes in Flattening Filter-Free Beams K. Mooney*, S. Yaddanapudi, S. Mutic, S. Goddu

Sunday SU-E-T-250

Determining VMAT Machine Limitations of An Elekta Linear Accelerator with Agility MLC for Accurate Modeling in RayStation and Robust Delivery K. Yang*, Z. Yu, H. Chen, F. Mourtada

Sunday SU-E-T-251

Developing a Daily Proton Beam Monitoring System I. Yeo*, A. Ghebremedhin, B. Patyal

Sunday SU-E-T-252

Developing a Pencil Beam Dose Calculation Algorithm for CyberKnife System B. Liang*, B. Liu, F. Zhou, S. Xu, Q. Wu

Sunday SU-E-T-253

Development of a GDPM Monte Carlo Based Quality Assurance Tool for Cyberknife M. Webster*, L. Ouyang, M. Folkerts, Z. Tian, X. Jia, S. Jiang, X. Gu

Sunday SU-E-T-254

Development of a HDR-BT QA Tool for Verification of Source Position with Oncentra Applicator Modeling Y. Kumazaki*, K. Miyaura, R. Hirai, K. Miyazawa, S. Makino, T. Tamaki, N. Shikama, S. Kato

Sunday SU-E-T-255

Development of a Michigan Quality Assurance (MQA) Database for Clinical Machine Operations D. Roberts*

Sunday SU-E-T-256

Development of a Monte Carlo-Based Dose-Calculation System in a Cloud Environment for IMRT and VMAT Dosimetric Verification Y. Fujita*

Sunday SU-E-T-257

Development of a New Endorectal Balloon with An Unfoldable Radiochromic Film for In-Vivo Rectal Dosimetry During Prostate Cancer Radiotherapy E. Jeang*, Y. Lim, K. Cho, U. Hwang, J. Kwak, S. Choi, J. Jeong, H. Kim, S. Kim, S. Lee, D. Shin, J. Park, J. Kim

Sunday SU-E-T-258

Development of a New Patient Set-Up Monitoring System Using Force Sensing Resistor (FSR) Sensor for the Radiation Therapy M. Cho*, T. Kim, S. Kang, D. Kim, K. Kim, D. Shin, T. Suh

Sunday SU-E-T-259

Development of a Primary Standard for LDR Brachytherapy H. Shen*, M. McEwen

Sunday SU-E-T-260

Development of a System to Verify for Connection Consistency in a Brachytherapy Y. Otani*, i. sumida, m. yagi, H. Mizuno, m. takashina, m. koizumi, k. ogawa

Sunday SU-E-T-261

Development of An Automated System to Detect Patient Identification and Positioning Errors Prior to Radiotherapy Treatment S. Jani*, D. Low, J. Lamb

Sunday SU-E-T-262

Development of An In-House Forward Planning System for Conformal Arc Therapy A. Eldib*, O. Chibani, L. Jin, J. Li, M. Lin, L. Chen, T. Lin, C. Ma

Sunday SU-E-T-263

Development of Dose Monitor Unit Calculation Using Clarkson Integration for Proton Beam Therapy Using Beam-Wobbling System Y. Nagata*, R. Kohno, Y. Takada, K. Hotta, H. Yamaguchi, T. Akimoto

Sunday SU-E-T-264

Development of Dose Response Analysis Program for Basic Radiobiological Modeling K. Lee*, W. Jung, T. Suh

Sunday SU-E-T-265

Development of Dose-To-Water Conversion Models for Pre-Treatment Verification with the New AS1200 Imager N. Miri, N. Miri*, C. Baltes, P. Keller, P. Greer

Sunday SU-E-T-266

Development of Evaluation System of Optimal Synchrotron Controlling Parameter for Spot Scanning Proton Therapy with Multiple Gate Irradiations in One Operation Cycle T. Yamada*, N. Miyamoto, T. Matsuura, T. Matsuura, S. Takao, Y. Matsuzaki, Y. Fujii, H. Koyano, H. Nihongi, M. Umezawa, K. Matsuda, K. Umegaki, H. Shirato

Sunday SU-E-T-267

Development of the Compact Graphite Calorimetry System for the High Energy Photon Beam B. Kim*, I. Kim, J. Kim, C. Yi

Sunday SU-E-T-268

Differences in Treatment Plan Quality and Delivery Between Two Commercial Treatment Planning Systems for Volumetric Arc-Based Radiation Therapy S. Chen*, H. Zhang, B. Zhang, W. D'Souza

Sunday SU-E-T-269

Differential Hazard Analysis For Conventional And New Linac Acceptance Testing Procedures T. Harry*, S. Yaddanapudi, B. Cai, S. Goddu, C. Noel, S. Mutic, T. Pawlicki

Sunday SU-E-T-270

Diffusion Synthetic Acceleration for Linear Boltzmann Transport Equation G. Chen*, X. Hong, H. Gao

Sunday SU-E-T-271

Direct Measurement of Tenth Value Layer Thicknesses for High Density Concretes with a Clinical Machine S. Tanny*, D. Harrell, M. Chopra, J. Noller, E. Parsai

Sunday SU-E-T-272

Direct Verification of a Treatment Planning System Megavoltage Linac Beam Photon Spectra Models, and Analysis of the Effects On Patient Plans D. Leheta*, D. Shvydka, E. Parsai

Sunday SU-E-T-273

Do Task Group External Beam QA Recommendations Guarantee Accurate Treatment Plan Dose Delivery? A. Templeton*, Y. Liao, G. Redler, H. Zhen

Sunday SU-E-T-274

Does Atmospheric Oxygen Affect the PRESAGE Dosimeter? M. Alqathami*, A. Blencowe, G. Ibbott

Sunday SU-E-T-275

Dose Build Up and Bolusing Characteristics for Total Body Irradiation Dosimetry M. Butson*, D. Pope, M. Whitaker

Sunday SU-E-T-276

Dose Calculation Accuracy with a Standard Beam Model for Extended SSD Treatments K. Kisling*, L. Court, S. Kirsner, C. Nelson

Sunday SU-E-T-277

Dose Calculation Comparisons Between Monaco, Pinnacle and Eclipse Treatment Planning Systems c. Bosse*, G. Narayanasamy, N. Kirby, P. Mavroidis, N. Papanikolaou, S. Stathakis

Sunday SU-E-T-278

Dose Conformity Index for the Target in a Multitarget Environment S. Harikrishnaperumal*

Sunday SU-E-T-279

Dose Enhancement Effect Due to Cerium Oxide Nanoparticles Employed as Radiation Protectants Z. Ouyang*, Y. Altundal, E. Sajo, W. Ngwa

Sunday SU-E-T-280

Dose Evaluation in Using CT Density Versus Relative Stopping Power for Pencil Beam Planning and Treating IROC Proton Phantom J. Syh*, X. Ding, L. Rosen, H. Wu

Sunday SU-E-T-281

Dose Measurements of Modulated Spot-Scanning Particle Beams with Beam-Gating of Respiratory-Phase W. Hsi, Z. Huang*, w. wang, Y. SHENG, Y. Deng

Sunday SU-E-T-282

Dose Measurements with An End-To-End Audit Phantom for Stereotactic Radiotherapy R. Jones*, R. Artschan, D. Thwaites, J. Lehmann

Sunday SU-E-T-283

Dose Perturbations Near Heterogeneity Junctions for Modulated-Scanning Protons Y. Deng*, Y. Li, Y. SHENG, F. Zhao, Z. Huang, L. Sun, J. Zhao, M. Moyers, W. Hsi, K. Shahnazi

Sunday SU-E-T-284

Dose Plan Optimization When Using Hydrogel Prostate-Rectum Spacer: A Single Institution Experience M. Rajecki*, A. Thurber, F. Catalfamo, M. Duff, D. Shah

Sunday SU-E-T-285

Dose Variation at Bone in Small-Animal Irradiation: A Monte Carlo Study Using Monoenergetic Photon Beams A. Vuong, J. Chow*

Sunday SU-E-T-286

Dose Verification of Spot-Scanning Proton Beam Using GafChromic EBT3 Film C. Chen, S. Tang*, D. Mah, M. Chan

Sunday SU-E-T-287

Dose Verification On the Variation of Target Volume and Organ at Risk in Preradiation Chemotherapy IMRT for Nasopharyngeal Cancer X. Zhang*, L. Kong, J. Wang, W. Hu, Z. Chen

Sunday SU-E-T-288

Dose Volume Population Histogram (DVPH): A New Method to Evaluate Intensity Modulated Proton Therapy Plans With Geometrical Uncertainties B. Nguyen*, T. Nguyen, N. Mai

Sunday SU-E-T-289

Dose-Volume-Effect Relationships for Lung Cancer Patients Treated with SBRT On a Prospective Protocol E. Mayyas*, S. Brown, J. Liu, J. Kim, Z. Sun, S. Devpura, M. Ajlouni, F. Siddiqui, B. Movsas, I. Chetty

Sunday SU-E-T-290

Dosimetric Accuracy of Acuros XB and Analytical Anisotropic Algorithm in Stereotactic Ablative Radiotherapy of Small Lung Lesions S. Yu*, Y. Yang, K. Bush, B. Fahimian, A. Hsu

Sunday SU-E-T-291

Dosimetric Accuracy of Multitarget Single Isocenter Radiosurgery F. Tannazi*, M. Huang, E. Thomas, J. Duan, X. Wu, S. Shen, R. Cardan, J. Fiveash, I. Brezovich, R. Popple

Sunday SU-E-T-292

Dosimetric Advantage of Prone Breast Radiotherapy for Korean Left-Sided Breast Cancer Patients Y. Chung*, J. Shin, J. Yu, W. Park, D. Choi, S. Huh, Y. Han, J. Kim

Sunday SU-E-T-293

Dosimetric Analysis of Microscopic Disease in SBRT for Lung Cancers R. Mao*, Y. Zhang, L. Ren, L. Tian, R. Gao, H. Ge, F. Yin

Sunday SU-E-T-294

Dosimetric Analysis of Planning Phase Using Overlap Volume Histogram for Respiratory Gated Radiotherapy S. Kang*, S. Kim, D. Kim, T. Kim, S. Park, D. Shin, M. Cho, K. Kim, T. Suh

Sunday SU-E-T-296

Dosimetric Analysis of Small Animal Image-Guided Irradiator Using High Resolution Optical CT Imaging of 3D Dosimeters Y. Na*, X. Qian, J. Adamovics, C. Wuu

Sunday SU-E-T-297

Dosimetric Assessment of An Air-Filled Balloon Applicator in HDR Vaginal Cuff Brachytherapy Using the Monte Carlo Method H. Jiang*, Y. Lee, D. Pokhrel, R. Badkul

Sunday SU-E-T-298

Dosimetric Assessment of Using Brass Mesh Bolus with High Energy X-Ray Beams R. Manger*, A. Yock, D. Soultan, T. Harry, L. Cervino

Sunday SU-E-T-299

Dosimetric Characterization of Small Field in Small Animal Irradiator with Radiochromic Films S. Han*, K. Kim, S. Choi, h. jung, Y. Ji, S. Park

Sunday SU-E-T-300

Dosimetric Comparision of 4D Radiation Therapy and 3D Radiation Therapy for the Liver Tumor Based On 4D Medical Image C. Ma*, Y. Yin

Sunday SU-E-T-301

Dosimetric Comparison Between Adaptive and Rectilinear Template-Based Prostate Seed Implants E. Neubauer Sugar*, I. Buzurovic, D. O'Farrell, J. Hansen, P. Devlin, R. Cormack, P. Nguyen

Sunday SU-E-T-302

Dosimetric Comparison Between Volumetric Modulated Arc Radiotherapy and Intensity-Modulated Radiotherapy for Locally Recurrent Nasopharyngeal Carcinoma J. Lu*, B. Huang, J. Zhang, C. Ma

Sunday SU-E-T-303

Dosimetric Comparison of a LINAC Fallback Plan Generated From Tomotherapy System C. Yang*, Y. Chen

Sunday SU-E-T-304

Dosimetric Comparison of Cavernous Sinus Tumors: Heterogeneity Corrected Pencil Beam (PB-Hete) Vs. X-Ray Voxel Monte Carlo (XVMC) Algorithms for Stereotactic Radiotherapy (SRT) D. Pokhrel*, S. Sood, R. Badkul, H. Jiang, H. Saleh, F. Wang

Sunday SU-E-T-305

Dosimetric Comparison of Cyberknife Versus Linac Based VMAT Stereotactic Treatment Planning for Localised Prostate Cancer V. Senniandavar*, S. Vikraman, K. KP, T. Rajesh, R. Sambasivaselli, M. Ramu, S. Maragathaveni, N. Dhivya, K. Tejinder

Sunday SU-E-T-306

Dosimetric Comparison of Leaf with Or Without Interdigitation in Multiple Brain Metastasis VMAT Treatment Planning J. Duan*

Sunday SU-E-T-307

Dosimetric Comparison of Prone Versus Supine Positioning for Adjuvant Breast Radiation Therapy C. Pope*, L. Hayes, J. Rella, B. Ruiz, B. O'Connor, J. Yang

Sunday SU-E-T-308

Dosimetric Comparison of SBRT VMAT Treatment Plans Generated for 6 MV, 6 MV FFF, and 10 MV FFF Photon Beams D. Wilson*, B. Wang, N. Dunlap

Sunday SU-E-T-309

Dosimetric Comparison of Simultaneous Integrated Boost Treatment Plan Between Intensity Modulated Radiotherapies (IMRTs), Dual Arc Volumetric Modulated Arc Therapy (DA-VMAT) and Single Arc Volumetric Modulated Arc Therapy (SA-VMAT) for Nasopharyngeal Carcinoma (NPC) R. SIVAKUMAR*, N. JANARDHAN, D. ANURADHA, P. BHAVANI, J. SURENDRAN, B. SARANGANATHAN, S. IBRAHIM, B. JHONSON, B. MADHURI

Sunday SU-E-T-310

Dosimetric Comparison of Tandem and Ovoid (TO) Vs. Tandem and Ring (TR) Applicators in High-Dose Rate (HDR) Brachytherapy (BT) for the Treatment of Locally-Advanced Cervical-Cancer L. Kuo*, A. Viswanathan, A. Damato

Sunday SU-E-T-311

Dosimetric Comparison of Volumetric Modulated Arc Therapy Plans for Preoperative Radiotherapy Rectal Cancer Using Flattening Filter-Free and Flattening Filter Modes W. Zhang*, J. Zhang, J. Lu, C. Chen

Sunday SU-E-T-312

Dosimetric Consideration for the Agility MLC When Planning Rotational SRT/SBRT Treatments X. Kong*, J. Harris, D. Spitznagel, J. Walker

Sunday SU-E-T-313

Dosimetric Deviation of Misaligned Beams for a 6 MV Photon Linear Accelerator Using Monte Carlo Simulations S. Kim*

Sunday SU-E-T-314

Dosimetric Effect of Smooth Drilling On Proton Compensators in Prostate Patients M. Reyhan*, N. Yue, J. Zou

Sunday SU-E-T-315

Dosimetric Effects of Couch Top Shift On VMAT Delivery in Absence of Indexing M. Islam*, H. Jin, S. Ferguson, S. Ahmad

Sunday SU-E-T-316

Dosimetric Effects Resulting From Increased MLC Error and Expanded Dose Dynamic Leaf Tolerances in Sliding Window IMRT T. Netherton*, G. Ding

Sunday SU-E-T-317

Dosimetric Evaluation of Acuros XB Advanced Dose Calculation Algorithm in Head and Neck Patients A. Faught*, Q. Wu

Sunday SU-E-T-318

Dosimetric Evaluation of ArcCHECK and 3DVH System Using Customized Polymer Gel Dosimeter K. Ono*, S. Fujimoto, S. Hayashi, M. Miyazawa, Y. Akagi, Y. Hirokawa

Sunday SU-E-T-319

Dosimetric Evaluation of IMRT with Mix-Energy Beam for Deep Seated Targets S. Sharma*, D. Manigandan, A. Gandhi, D. Sharma, V. Subramani, S. Chander, P. Julkha, G. Rath

Sunday SU-E-T-320

Dosimetric Evaluation of Intracranial Stereotactic Radiotherapy Plans Using Jaws-Only Collimation On a LINAC N. Mistry*, A. Kim, J. Schaum, M. Bermudez, K. Driscoll, C. Holowinski, C. Yang, Y. Chen, N. Sheth

Sunday SU-E-T-321

Dosimetric Evaluation of Non-Coplanar Arcs in VMAT Planning for SBRT Lung Cases: A Planning Study S. Lu*, S. Gardner, A. Doemer, I. Chetty

Sunday SU-E-T-322

Dosimetric Evaluation of Rib Dose in Peripheral Lung Tumors Treated with X-Ray Voxel Monte Carlo (XVMC) Based Lung Stereotactic Body Radiotherapy (SBRT) Following RTOG 0915 Guidelines D. Pokhrel*, S. Sood, R. Badkul, H. Jiang, P. Kumar, F. Wang

Sunday SU-E-T-323

Dosimetric Evaluation of Small Fields for SBRT Treatment R. Gupta*, A. Eldib, B. Wang, C. Ma, J. Li

Sunday SU-E-T-324

Dosimetric Evaluation of Soft Docking Sensitivity On An INTRAOP Mobetron IORT Device M. Carlson*, J. Hessler, S. Grzetic, N. Gupta

Sunday SU-E-T-325

Dosimetric Impact Due to FlexiShield in Electronic Brachytherapy (eBx) of Breast IORT: A Phantom Study Y. Kim*, J. Huynh, M. Ley, V. Gonzalez

Sunday SU-E-T-326

Dosimetric Impact of Beam Energies and Jaw Tracking On Intracranial Tumors Using RapidArc S. Hossain*, V. Keeling, I. Ali, S. Ahmad, O. Algan

Sunday SU-E-T-327

Dosimetric Impact of Beam Energy for Intrabeam Breast IORT with Different Residual Cancer Cell Distributions After Surgery M. Schwid, H. Zhang*

Sunday SU-E-T-328

Dosimetric Impact of Cobalt-Chrome Stabilization Hardware in Paraspinal Radiation Therapy G. Tang*, T. LoSasso, Z. Saleh, J. Mechalakos, S. Lim, I. Laufer, M. Bilsky, J. Yamada, D. Lovelock

Sunday SU-E-T-329

Dosimetric Impact of Implementing Metal Artifact Reduction Methods and Metal Energy Deposition Kernels for Photon Dose Calculations J. Huang*, D. Followill, R. Howell, X. Liu, D. Mirkovic, F. Stingo, S. Kry

Sunday SU-E-T-330

Dosimetric Impact of Intrafraction Respiratory Motion On Lung SBRT Treatment Using Cyberknife 0-View Tracking Mode M. Rao*, F. Chen, C. Cotrutz, J. Ye

Sunday SU-E-T-331

Dosimetric Impact of Multileaf Collimator Leaf Width On Stereotactic Radiosurgery (SRS) RapidArc Treatment Plans for Single and Multiple Brain Metastases S. Hossain*, V. Keeling, S. Ahmad, O. Algan

Sunday SU-E-T-332

Dosimetric Impact of Photon Energy and Treatment Technique When Knowledge Based Auto-Planning Is Implemented in Radiotherapy of Localized Prostate Cancer Z. Liu*, E. Larsen, H. Salmon, A. Grow, C. Hayes, C. Balamucki, M. Thompson, A. Kennedy

Sunday SU-E-T-333

Dosimetric Impact of Rotational Error On the Target Coverage in IMPT Lung Cancer Plans S. Rana*, Y. Zheng

Sunday SU-E-T-334

Dosimetric Impacts of Organ at Risk (OAR) Contour Errors in Prostate Volumetric Modulated Arc Therapy (VMAT) Planning: A Sensitivity Study J. Chang*, X. Gu, W. Lu, T. Song, X. Jia, S. Jiang

Sunday SU-E-T-335

Dosimetric Investigation of An Advanced Rotating Gamma Ray System for Imaged Guided Radiation Therapy C. Ma*, A. Eldib, C. Li, O. Chibani, G. Mora, J. Li, L. Chen

Sunday SU-E-T-336

Dosimetric Properties of a New Solid Water High Equivalency Phantom for High-Energy Photon Beams F. Araki*, T. Ohno, R. Onitsuka, Y. Shimohigashi

Sunday SU-E-T-337

Dosimetric Study of TMI Using Helical Tomotherapy r. phurailatpam*, J. Swamidas, J. Sastri, K. Josi, M. Mathankar, S. Paul, M. Sawant, P. moundekar

Sunday SU-E-T-338

Dosimetric Study of Volumetric Modulated Arc Therapy (VMAT) and Intensity Modulated Radiation Therapy (IMRT) for Stereotactic Body Radiation Therapy (SBRT) in Early Stage Lung Cancer I. Ahmad, R. Yah, K. Quinn, A. Seebach, H. Wang*

Sunday SU-E-T-339

Dosimetric Verification of Acuros XB Dose Calculation Algorithm On An Air Cavity for 6-MV Flattening Filter-Free Beam S. Kang*, J. Chung, T. Suh

Sunday SU-E-T-340

Dosimetry of a Small Field Electron Beam for Innovative Radiotherapy of Small Surface Or Internal Tumors C. Reft*, Z. Lu, J. Noonan

Sunday SU-E-T-341

DVH-Based Comparison of True 3D Measurements to a Delta4 System E. Crockett*, L. Ren, M. Oldham

Sunday SU-E-T-342

Dynamic Accuracy and Stability of Novel Multi-Leaf Collimator (MLC) for Volumetric Modulated Arc Therapy (VMAT) Y. Nakaguchi*

Sunday SU-E-T-343

Dynamic Collimator Rotation for Volumetric Modulated Arc Therapy M. Fix*, D. Frei, W. Volken, D. Terribilini, P. Manser

Sunday SU-E-T-344

Dynamic Electron Beam Therapy Using Multiple Apertures in a Single Cut-Out A. Rodrigues*, F. Yin, Q. Wu

Sunday SU-E-T-345

Effect of DLG and MLC Transmission Value Set in the Treatment Planning System (TPS) On Dosimetric Accuracy of True Beam Hypofractionated SRT/SBRT and 2Gy/fx Prostate Rapid Arc Plans X. Wu*, Y. Wang

Sunday SU-E-T-346

Effect of Jaw Position On Dose to Critical Structures in 3-D Conformal Radiotherapy Treatment of Pancreatic Cancer N. Paudel*, E. Han, X. Liang, S. Morrill, X. Zhang, M. HARDEE, j. Penagaricano, V. Ratanatharathorn, Vaneerat

Sunday SU-E-T-347

Effect of MLC Leaf Position Inaccuracy On Dose Distribution for Spinal SBRT with Different Energies and Dose Rates T. You*, J. DANG, C. Dai, F. Yin

Sunday SU-E-T-348

Effect of Treatment Table and Immobilization Devices On Surface Dose When Using a GRID Technique S. Gajdos*, J. Donaghue

Sunday SU-E-T-349

Effective Dose-Volume-Histogram Prediction Method Using Euclidean Distance Volume Histogram for Volumetric Modulated Arc Therapy to Treat Prostate Cancer J. Shin*, J. Liang, W. Liu, S. Schild, W. Wong

Sunday SU-E-T-350

Effective Point of Measurement and Total Perturbation Correction P for Parallel-Plate Ion Chambers in High-Energy Photon Beams N. Langner, D. Czarnecki, P. von Voigts-Rhetz, K. Zink*

Sunday SU-E-T-351

Effects of Isocenter Location, MLC Aperture Angle and Gantry Angle On Dose Distribution R. Li, T. Xue, C. Song*, C. Xue

Sunday SU-E-T-352

Effects of Skull Attenuation and Missing Backscatter On Brain Dose in HDR Treatment of the Head with Surface Applicators F. Cifter*, S. Dhou, Y. Altundal, E. Sajo, J. Lewis, R. Cormack

Sunday SU-E-T-353

Effects of Time and Temperature On a Potential Reusable 3D Dosimeter T. Juang*, D. Miles, E. Crockett, J. Adamovics, M. Oldham

Sunday SU-E-T-354

Efficient and Enhanced QA Testing of Linear Accelerators Using a Real-Time Beam Monitor J. Jung*, M. Farrokhkish, B. Norrlinger, Y. Wang, R. Heaton, D. Jaffray, M. Islam

Sunday SU-E-T-355

Efficient Scatter Correction for Direct Ray-Tracing Based Dose Calculation M. Chen*, S. Jiang, W. Lu

Sunday SU-E-T-356

Efficient Segmentation of Flattening Filter Free Photon Beamsfor 3D-Conformal SBRT Treatment Planning J. Barbiere*, G. Beninati, A. Ndlovu

Sunday SU-E-T-357

Electronic Compensation Technique to Deliver Total Body Dose T. Lakeman*, I. Wang, M. Podgorsak

Sunday SU-E-T-358

Empirical Beam Angle Optimization for Lung Cancer Intensity Modulated Radiation Therapy B. Doozan*, S. Pella

Sunday SU-E-T-359

Emulation of Yb-169 Gamma-Ray Spectrum Using Metal-Filtered 250 KVp X-Rays for Pre-Clinical Studies of Gold Nanoparticle-Aided Radiation Therapy F. Reynoso*, S. Cho

Sunday SU-E-T-360

End-To-End Dosimetric Testing of a Versa HD Linear Accelerator with the Agility Head Modeled in Pinnacle3 D. Saenz*, G. Narayanasamy, W. Cruz, N. Papanikolaou, S. Stathakis

Sunday SU-E-T-361

Energy Dependent Radiation/light-Field Misalignment On Truebeam Linear Accelerator N. Sperling*, S. Tanny, E. Parsai

Sunday SU-E-T-362

Enhanced Dynamic Wedge Output Factors for Varian 2300CD and the Case for a Reference Database C. Njeh*

Sunday SU-E-T-363

Error Detection Comparison of EPID and MLC Log File Based IMRT QA Systems D. Defoor*, M. Obeidat, P. Linden, N. Kirby, P. Mavroidis, N. Papanikolaou, S. Stathakis

Sunday SU-E-T-364

Estimating the Minimum Number of Patients Required to Estimate the Required Planning Target Volume Margins for Prostate Glands M. Bakhtiari*, J. Schmitt, M. Sarfaraz, C. Osik

Sunday SU-E-T-365

Estimation of Neutron Ambient Dose Equivalents for Radioprotection Exposed Workers in Radiotherapy Facilities Based On Characterization Patient Risk Estimation L. Irazola*, C. Domingo, M. Romero-Expósito, M. García-Fusté, J. Terron, B. SANCHEZ-NIETO, R. Bedogni, F. Sanchez-Doblado

Sunday SU-E-T-366

Estimation of Whole Body Dose From Cranial Irradiation From C and Perfexion Series Gamma Knife Units S. Srivastava*, A. Andersen, B. Lulu, C. Cheng, I. Das

Sunday SU-E-T-367

Evaluate the Dosimetric Impacts On Patient Specific Treatment Plans Due to Set Up Uncertainties During LINAC Annual QA and Commission V. Nguyen*, C. Shi, B. Wang

Sunday SU-E-T-368

Evaluating Dosimetric Outcome of Modulated Photon Radiotherapy (XMRT) Optimization for Head and Neck Patients P. McGeachy*, J. Villarreal-Barajas, Y. Zinchenko, R. Khan

Sunday SU-E-T-369

Evaluating Intensity Modulated Proton Therapy Relative to Passive Scattering Proton Therapy for Increased Vertebral Column Sparing in CSI of Pediatric Patients J. Seco*, D. Giantsoudi, B. Eaton, J. Adams, H. Paganetti, S. MacDonald

Sunday SU-E-T-370

Evaluating Plan Quality and Dose Delivery Accuracy of Tomotherapy SBRT Treatments for Lung Cancer S. Blake, C. Hansen, S. Deshpande, P. Phan, I. Franji, L. Holloway, D. Thwaites*

Sunday SU-E-T-371

Evaluating the Convolution Algorithm of a Commercially Available Radiosurgery Irradiator Using a Novel Phantom J. Cates*, R. Drzymala

Sunday SU-E-T-372

Evaluation and Comparison of Second-Check Monitor Unit Calculation Software with Pinnacle Treatment Planning System B. Tuazon*, G. Narayanasamy, N. Kirby, P. Mavroidis, N. Papanikolaou, S. Stathakis

Sunday SU-E-T-373

Evaluation and Reduction of Contralateral Skin /subcutaneous Dose for Tangential Breast Irradiation M. Butson*, S. Carroll, M. Whitaker, D. Odgers, D. Martin, S. Hinds, J. Kader, K. Ho, S. Amos, J. Toohey

Sunday SU-E-T-374

Evaluation and Verification of Dose Calculation Accuracy with Different Dose Grid Sizes for Intracranial Stereotactic Radiosurgery C. Han*, T. Schultheiss

Sunday SU-E-T-375

Evaluation of a MapCHECK2(tm) Planar 2-D Diode Array for High-Dose-Rate Brachytherapy Treatment Delivery Verifications N. Macey*, M. Siebert, D. Shvydka, E. Parsai

Sunday SU-E-T-376

Evaluation of a New Stereotactic Diode for Small Field Dosimetry J. Kralik*, P. Kosterin, R. Mooij, T. Solberg

Sunday SU-E-T-377

Evaluation of a Novel Transmission Detector as a Reference Chamber for Use in Beam Measurements D. Epstein*, E. Shekel, D. Levin

Sunday SU-E-T-378

Evaluation of An Analytical Model for the Inter-Seed Attenuation Effect in 103-Pd Multi-Seed Implant Brachytherapy H. Safigholi*, A. Meigooni, D. Han, A. Soliman, W. Song

Sunday SU-E-T-379

Evaluation of An EPID-Based System for Daily Dosimetry Check by Comparison with a Widely-Used Ionization Chamber-Based Device D. McDonald*, N. Koch, J. Peng, D. Jacqmin, M. Ashenafi, K. Vanek

Sunday SU-E-T-380

Evaluation of BEBIG HDR 60Co System for AccuBoost Therapy M. Zehtabian, S. Sina, M. Rivard, A. Meigooni*

Sunday SU-E-T-381

Evaluation of Calculated Dose Accuracy for Organs-At-Risk Located at Out-Of-Field in a Commercial Treatment Planning System for High Energy Photon Beams Produced From TrueBeam Accelerators L. Wang*, G. Ding

Sunday SU-E-T-382

Evaluation of Clinical Application and Dosimetric Comparison for Treatment Plans of Gamma Knife and CyberKnife for Arteriovenous Malformations C. Kuo*

Sunday SU-E-T-383

Evaluation of Deep Inspiration Breath-Hold Technique for Post-Mastectomy Proton Pencil Beam Scanning Therapy N. Depauw*, S. Patel, S. MacDonald, H. Lu

Sunday SU-E-T-384

Evaluation of Dose to Medium Vs. Dose to Water Calcualtion Mode in Acuros XB Algorithm for Lung SBRT . Pokharel*, S. Oyewale, S. Rana

Sunday SU-E-T-385

Evaluation of DVH Change for PTV Due to Patient Weight Loss in Prostate VMAT Using Gaussian Error Function H. Viraganathan, R. Jiang, J. Chow*

Sunday SU-E-T-386

Evaluation of EBT3 Film Response in Different Batches F. Escarcia*, J. Herrera, O. Garcia

Sunday SU-E-T-387

Evaluation of Effective Treatment Depth in Skin Cancer Treatments with Xoft Electronic Brachytherapy I. Dragojevic*, J. Hoisak

Sunday SU-E-T-388

Evaluation of Electronic Brachytherapy Dose Distributions in Tissue Equivalent Materials M. Johnson*, S. Ahmad, D. Johnson

Sunday SU-E-T-389

Evaluation of Flattening-Filter-Free Arcs for Lung SBRT L. Ouyang*, H. Lee, A. Pompos, Y. Yan, S. Jiang, R. Foster

Sunday SU-E-T-390

Evaluation of Heterogeneity Corrections Made by RayStation Treatment Planning M. Rodriguez*, S. Bartolac, M. Rezaee, J. Bissonnette

Sunday SU-E-T-391

Evaluation of Image Parameters Impact On the CT Calibration Curve for Proton Therapy Z. Xiao*, M. Reyhan, Q. Huang, M. Zhang, N. Yue, T. Chen

Sunday SU-E-T-392

Evaluation of Ion Chamber/film and Log File Based QA to Detect Delivery Errors C. Nelson*, J. Ohrt, B. Mason, S. Kirsner

Sunday SU-E-T-393

Evaluation of Large Field IMRT Versus RapidArc Planning for Carcinoma Cervix with Para-Aotic Node Irradiation S. Kothanda Raman*, Y. Girigesh, M. MISHRA, K. Lalit

Sunday SU-E-T-394

Evaluation of Microwave Ablation Zone Variance Based On Reported Changes in Thermal and Electrical Properties of Tissues G. Deshazer*, P. Prakash, M. Hagmann, D. Dupuy, D. Merck

Sunday SU-E-T-395

Evaluation of Multiple Brain Metastases Stereotactic Treatment Planning in Cyberknife Versus Linac S. Vikraman*, D. Manigandan, K. KP, T. Rajesh, R. Sambasivaselli, V. Senniandavar, M. Ramu, S. Maragathaveni, N. Dhivya, M. Muthukumaran, T. Kataria

Sunday SU-E-T-396

Evaluation of Novel Open Face Intracranial Immobilization Devices D. Wiant*, J. Maurer, H. Liu, L. Hayes, B. Sintay

Sunday SU-E-T-397

Evaluation of Planned Dose Distributions by Monte Carlo (0.5%) and Ray Tracing Algorithm for the Spinal Tumors with CyberKnife H. Cho*, J. Hepel, J. Brindle

Sunday SU-E-T-398

Evaluation of Radiobiological Parameters Using Serial Tumor Imaging During Radiotherapy as An Inverse Ill-Posed Problem A. Chvetsov*, G. Sandison, J. Schwartz, R. Rengan

Sunday SU-E-T-399

Evaluation of Selection Criteria for Computational Human Phantoms for Use in Out-Of-Field Organ Dosimetry for Radiotherapy Patients C. Pelletier*, J. Jung, C. Lee, A. Pyakuryal, J. Kim, C. Lee

Sunday SU-E-T-400

Evaluation of Shielding and Activation at Two Pencil Beam Scanning Proton Facilities N. Remmes*, D. Mundy, J. Stoker, K. Classic, K. Nelson, C. Beltran, M. Bues, J. Kruse, M. Herman

Sunday SU-E-T-401

Evaluation of TG-43 Dose Calculation Accuracy for SAVI-Based Accelerated Partial Breast Irradiation (APBI) Via Monte Carlo Simulations Y. Xu, Z. Tian*, D. Scanderbeg, M. Zhang, C. Yashar, S. Jiang, X. Jia

Sunday SU-E-T-402

Evaluation of the Accuracy of a Novel Open Mask System for Immobilization of Cranial Stereotactic Radiosurgery Patients K. Song*, N. Wen, Y. Qin, J. Kim, H. Li, K. Snyder, J. Gordon, I. Chetty, S. Siddiqui

Sunday SU-E-T-403

Evaluation of the Beam Performance of a Varian TrueBeam Linear Accelerator Under External Device-Based Gated Delivery Conditions K. Kobulnicky*, D. Pawlak, A. Purwar

Sunday SU-E-T-404

Evaluation of the Effect of Spine Hardware for CyberKnife Spinal Stereotactic Radiosurgery J. Yuan*, Y. Zhang, Y. Zheng, B. Wessels, M. Machtay, M. Yao, S. Lo

Sunday SU-E-T-405

Evaluation of the Raystation Electron Monte Carlo Algorithm for Varian Linear Accelerators P. Sansourekidou*, C. Allen

Sunday SU-E-T-406

Evaluation of the Stealth Chamber by IBA Under Large Field Conditions L. Vazquez Quino*, C. Huerta Hernandez, M. DeWeese

Sunday SU-E-T-407

Evaluation of the Stopping Power and Imaging Visibility for Iodine Based Contrast in Proton Therapy H. Singh*, L. Zhao, S. Rana, M. Chacko, Y. Zheng

Sunday SU-E-T-408

Evaluation of the Type and Frequency of Variations Discovered During Routine Secondary Patient Chart Review M. Hardin*, A. Harrison, V. Lockamy, J. Li, C. Peng, P. Potrebko, Y. Yu, L. Doyle, J. Cao

Sunday SU-E-T-409

Evaluation of Tissue Composition Effect On Dose Distribution in Radiotherapy with 6 MV Photon Beam of a Medical Linac M. Ghorbani, Z. Tabatabaei, A. Vejdani Noghreiyan, A. Meigooni*

Sunday SU-E-T-410

Evaluation of Treatment Modalities for Stereotactic Lung Radiation Therapy: A Phantom Study D. Mohatt*, H. Malhotra

Sunday SU-E-T-411

Evaluation of Treatment Plan Quality Between Two Treatment Planning Systems for VMAT T. Yang, W. Xu, R. Ge, B. Qu, S. Xu*

Sunday SU-E-T-412

Evaluation of Tungsten-Based Functional Paper for Attenuation Device in Intraoperative Radiotherapy for Breast Cancer T. Kamomae*, H. Monzen, K. Okudaira, Y. Miyake, H. Oguchi, M. Komori, M. Kawamura, Y. Itoh, T. Kikumori, S. Naganawa

Sunday SU-E-T-413

Examining Acquisition Rate for Using MatriXX Ion Chamber Array to Measure HDR Brachytherapy Treatments M. Wagar*, M. Bhagwat, D. O'Farrell, S. Friesen, I. Buzurovic, A. Damato, P. Devlin, R. Cormack

Sunday SU-E-T-414

Experimental Correction of High-Z Electrode Effect in Mini-Ionization Chambers for Small Beam Dosimetry J. Larraga-Gutierrez*

Sunday SU-E-T-415

Experimental Determination of the Relative Stopping Power of TRUFILL N-BCA Liquid Embolic System in a Clinical Proton Beam A. Mandapaka*, A. Ghebremedhin, B. Patyal

Sunday SU-E-T-416

Experimental Evaluation of a Commercial GPU-Based Monte Carlo Dose Calculation Algorithm M. Paudel*, A. Kim, D. Beachey, S. Ahmad, A. Sarfehnia, A. Sahgal, B. Keller

Sunday SU-E-T-417

Experimental Verification of Robustness Optimized Intensity Modulated Proton Therapy Plans for Craniospinal Irradiation J. Yu*, L. Liao, N. Sahoo, X. Zhu, M. Gillin, X. Zhang

Sunday SU-E-T-418

Explore the Sensitive of the Planar Quality Assurance to the MLC Error with Different Beam Complexity in Intensity-Modulate Radiation Therapy J. Wang*, J. Peng, j. xie, W. Hu

Sunday SU-E-T-419

Fabricating Cerrobend Grids with 3D Printing for Spatially Modulated Radiation Therapy: A Feasibility Study X. Zhu*, J. Driewer, Y. Lei, D. Zheng, S. Li, T. Cullip, S. Chang, Q. Zhang, M. Zhang, S. Zhou

Sunday SU-E-T-420

Failure Effects Mode Analysis for Trigeminal Neuralgia Frameless Radiosurgery M. Coons, T. Denton, J. Howe*, A. Odom, A. Spalding, D. Sun

Sunday SU-E-T-421

Failure Mode and Effects Analysis (FMEA) of Xoft Electronic Brachytherapy for the Treatment of Superficial Skin Cancers J. Hoisak*, R. Manger, I. Dragojevic

Sunday SU-E-T-422

Fast Analytical Beamlet Optimization for Volumetric Intensity-Modulated Arc Therapy K. Chan*, L. Lee, L. Xing, A. Chan

Sunday SU-E-T-423

Fast Photon Convolution Calculation with a 3D-Ideal Kernel On the GPU S. Moriya*, H. Tachibana, M. Sato

Sunday SU-E-T-424

Feasibility of 3D Printed Radiological Equivalent Customizable Tissue Like Materials D. Johnson*, C. Ferreira, S. Ahmad

Sunday SU-E-T-425

Feasibility of Establishing a National Postal Dosimetry System Using EBT3 Gafchromic Film W. Abdel-Rahman*, I. Mohammed, S. Bamajboor

Sunday SU-E-T-426

Feasibility of Stereotactic Body Radiation Therapy (SBRT) Treatment of Pancreatic Cancer Using Volumetric Modulated Arc Therapy (VMAT) with Active Breathing Control (ABC) Y. Zhang*, J. Jackson, G. Davies, J. Herman, R. Teboh Forbang

Sunday SU-E-T-427

Feasibility Study for Evaluation of IMRT Dose Distribution Using Geant4-Based Automated Algorithms H. Choi*, W. Shin, J. Kim, M. Testa, C. Min

Sunday SU-E-T-428

Feasibility Study of 4D Image Reconstruction by Organ Motion Vector Extension Based On Portal Images J. Yoon*, J. Jung, I. Yeo, J. Kim, B. Yi

Sunday SU-E-T-429

Feasibility Study On Three-Dimensional GRID Therapy in Conventional Linacs Y. Yan*, J. Meyer, R. Timmerman, B. Hrycushko, B. Chen, D. Saha, S. Jiang

Sunday SU-E-T-430

Feasibility Study On Using Overlap Volume Histogram to Predict the Dose Difference by Respiratory Motion D. Shin*, S. Kang, D. Kim, T. Kim, K. Kim, M. Cho, T. Suh

Sunday SU-E-T-431

Feasiblity of Using CT Scout Images for 2D LDR Brachytherpay Planning J. Ha*, R. Weaver, M. Mariscal

Sunday SU-E-T-432

Field Size Influence On the Electron and Photon Spectra Within Small MV Field Detectors H. Benmakhlouf*, P. Andreo

Sunday SU-E-T-433

Field-In-Field Irradiation for Breast Cancer with VERO-4DRT System: A Feasibility Study N. Hayashi*, T. Mizuno, Y. Takada, T. Murai

Sunday SU-E-T-434

Fixed Margin Or Online Adaptation for Intermediate-Risk Prostate Stereotactic Body Radiation Therapy? A Dosimetric Study Y. Sheng*, T. Li, F. Yin, Q. Wu

Sunday SU-E-T-435

Flattening Filter Free Beams for Head and Neck IMRT and VMAT Optimization s. ghahremani*, R. Chavez, Y. Li, R. Crownover, D. Baacke, N. Papanikolaou, S. Stathakis

Sunday SU-E-T-436

Fluence-Based Trajectory Optimization for Non-Coplanar VMAT G. Smyth*, P. Evans, J. Bamber, F. Saran, H. Mandeville, J. Bedford

Sunday SU-E-T-437

Four-Dimensional Treatment Planning for Lung VMAT-SBRT M. Hashimoto*, S. OOHIRA, Y. UEDA, M. MIYAZAKI, M. ISONO, A. MASAOKA, m. takashina, m. koizumi, T. TESHIMA

Sunday SU-E-T-438

Frameless Cranial Stereotactic Radiosurgery Immobilization Effectiveness Evaluation T. Tseng*, S. Green, R. Sheu, Y. Lo

Sunday SU-E-T-439

Fundamental Verification of Respiratory-Gated Spot Scanning Proton Beam Therapy H. Hamano*, N. Hayashi, T. Yamakawa, K. Yasui, H. Kato

Sunday SU-E-T-440

Gain Calibration Stability Study of a MV Flat-Panel-Detector (FPD) On Siemens ARTISTE Linac Y. Lei*, D. Zheng, S. Wang, X. Zhu, Q. Zhang, S. Li, J. Driewer, S. Zhou

Sunday SU-E-T-441

Gamma Passing Rates for IMRT QA and VMAT QA E. Kremmel*, T. Giaddui, J. Keller, M. Fu, C. Peng, L. Doyle, Y. Yu, A. Harrison

Sunday SU-E-T-442

Geometric Calibration and Verification of a GammaPod Breast SBRT System C. Yu*, Y. Niu, Y. Mutaf, P. Maton, P. Hoban

Sunday SU-E-T-443

Geometric Uncertainties in Eye Plaque Dosimetry for a Fully Loaded 16 Mm COMS Plaque H. Morrison*, G. Menon, H. Jans, M. Larocque, R. Sloboda

Sunday SU-E-T-444

Gravity Effect On Maximum Leaf Speed in Dynamic IMRT Treatments J. Olasolo*, S. Pellejero, J. Artacho, M. Gracia, N. Gallardo, M. Martin, S. Lozares, F. Mañeru, L. Bragado, S. Miquelez

Sunday SU-E-T-445

Gross Error Detection Based On EPID-Image-Extracted MLC-Leaf-Position Monitoring K. Kathuria*, W. Watkins, J. Siebers

Sunday SU-E-T-446

Group-Sparsity Based Angle Generation Method for Beam Angle Optimization H. Gao*

Sunday SU-E-T-447

Growth of Metal Whiskers Under External Beam Irradiation: Experimental Evidence and Implications in Medical Electronic Devices for Radiation Therapy Treatments D. Shvydka*, G. Warrell, E. Parsai, V. Karpov, A. Vasko

Sunday SU-E-T-448

Heightened Apical Positivity of 2-Year Post-Radiotherapy Biopsies Is Not Related to Suboptimal Dosimetry M. Studenski*, R. Stoyanova, M. Abramowitz, N. Dogan, A. Pollack

Sunday SU-E-T-449

Hippocampal Sparing Radiotherapy Using Intensity Modulated Radiotherapy and Volumetric Modulated Arc Therapy S. Moon*, D. Kim, W. Chung, M. Yoon

Sunday SU-E-T-450

How Important Is a Reproducible Breath Hold for DIBH Breast Radiotherapy? H. Liu, S. Wentworth, B. Sintay, D. Wiant*

Sunday SU-E-T-451

Hybrid-VMAT: A Novel Technique Combining VMAT and 3D in Planning Whole Breast Radiotherapy with a Simultaneously-Integrated Boost (WBRT+SIB) K. Guida*, K. Qamar, M. Thompson

Sunday SU-E-T-452

Identifying Inefficiencies in Radiation Oncology Workflow and Prioritizing Solutions for Process Improvement and Patient Safety N. Bennion, J. Driewer*, K. Jacobs, M. Poole, R. McMahon, K. Wilson, K. Denniston, w. zhen, A. Yager, C. Enke

Sunday SU-E-T-453

Image-Guided Patient-Specific Quality Assurance for Multi-Target Single Isocenter Intracranial VMAT Radiosurgery M. Huang*, I. Brezovich, J. Duan, X. Wu, S. Shen, R. Cardan, J. Fiveash, R. Popple

Sunday SU-E-T-454

Impact of Air Gap On PDDs of 6 MV Photon Beam for Various Field Sizes in Inhomogeneous Phantoms S. Oyewale*, . Pokharel, H. Singh, M. Islam, S. Rana

Sunday SU-E-T-455

Impact of Different Independent Dose Verification Software Programs for Secondary Check M. Itano*, T. Yamazaki, M. Yamashita, S. Ishibashi, Y. Higuchi, M. Kosaka, N. Kobayashi, H. Tachibana

Sunday SU-E-T-456

Impact of Dose Calculation Algorithms On Biologically Optimized VMAT Plans for Esophageal Cancer T. Rajesh*, N. Arunai, S. Vikraman, K. KP, A. Sigamani, B. Subbarao, M. Ramu, R. Sambasivaselli, V. Senniandavar, K. Tejinder

Sunday SU-E-T-457

Impact of Interfractional Variations On Anterior Vs. Lateral-Field Proton Therapy of Prostate Cancer M. Moteabbed*, A. Trofimov, G. Sharp, Y. Wang, A. Zietman, J. Efstathiou, H. Lu

Sunday SU-E-T-458

Impact of Parameters for Volumetric Modulated Arc Therapy (VMAT) for Rectal Cancer L. Runxiao, C. Yankun*, Q. Rong, S. Yuzhi, S. Kai, M. Mingchang

Sunday SU-E-T-459

Impact of Source Position and Traveling Time On HDR Skin Surface Applicator Dosimetry J. Jeong*, C. Barker, M. Zaider, G. Cohen

Sunday SU-E-T-460

Impact of the LINAC Repetition Rate On a High-Resolution Liquid Ionization Chamber Array for Patient-Specific QA S. Wang*, J. Driewer, D. Zheng, Y. Lei, Q. Zhang, X. Zhu, S. Li, C. Enke, B. Xu, S. Zhou

Sunday SU-E-T-461

Impact of the Radiation Sensitivity of Tumor and Geometric Design of the GRID Block On the Clinical Response of Grid Therapy S. Gholami, A. Meigooni*, H. Nedaie, F. Longo, M. Ay

Sunday SU-E-T-462

Impact of the Radiochromic Film Energy Response On Dose Measurements of Low Energy Electronic Brachytherapy Sources L. Liang*, H. Bekerat, N. Tomic, F. DeBlois, S. Devic, M. Morcos, M. Popovic, P. Watson, J. Seuntjens

Sunday SU-E-T-463

Impact to Total Scatter Factors On the Calculated Dose Distribution in Radiosurgery O. Garcia*, J. Larraga-Gutierrez

Sunday SU-E-T-464

Implementation and Validation of 4D Acuros XB Dose Calculations S. Thomas*, V. Huang, M. Milette, C. Yuen, T. Teke

Sunday SU-E-T-465

Implementation of An Automated Collision Detection Program Using Open Source Software for the Pinnacle Treatment Planning System S. Tanny*, J. Bogue, E. Parsai, N. Sperling

Sunday SU-E-T-466

Implementation of An Extension Module for Dose Response Models in the TOPAS Monte Carlo Toolkit J. Ramos-Mendez*, J. Perl, J. Schuemann, J. Shin, H. Paganetti, B. Faddegon

Sunday SU-E-T-467

Implementation of Monte Carlo Dose Calculation for a Multileaf Collimator Equipped Robotic Radiotherapy System J. Li*, J. Fan, C. Ma

Sunday SU-E-T-468

Implementation of the TG-142 QA Process for Seven Linacs with Enhanced Beam Conformance J. Woollard*, A. Ayan, D. DiCostanzo, S. Grzetic, J. Hessler, N. Gupta

Sunday SU-E-T-469

Implementation of VAs Web-Based Radiotherapy Incident Reporting and Analysis System (RIRAS) R. Kapoor*, G. Malik, J. Palta, M. Hagan

Sunday SU-E-T-470

Importance of HU-Mass Density Calibration Technique in Proton Pencil Beam Dose Calculation S. Penfold*, A. Miller

Sunday SU-E-T-471

Improvement of Gamma Knife Treatment Planning Through Tumor Control Probability for Metastatic Brain Tumors Z. Huang*, Y. Feng, T. Liu, S. Lo, C. Luo, K. Rasmussen, R. Wang, J. Grecula, N. Mayr, W. Yuh

Sunday SU-E-T-472

Improvement of IMRT QA Passing Rate by Correcting Angular Dependence of MatriXX Q. Chen*, W. Watkins, T. Kim, B. Neal

Sunday SU-E-T-473

Improvements of GPU Based Calculations Over CPU Based Calculations and the Effects of Variable Computer Hardware J. Donaghue*, S. Gajdos

Sunday SU-E-T-474

Improvements to Intra-Oral Shield Design for Electron Beam Treatments : Use of Multi-Layered Metal Foils M. Butson*

Sunday SU-E-T-475

Improvements to Total Body Irradiation Dosimetry Efficiency with EBT3 Radiochromic Film and a Template System M. Butson*, D. Pope, M. Whitaker

Sunday SU-E-T-476

Improving KCl:Eu2+ Dosimeter Sensitivity: The Role of Oxygen Z. Xiao*, T. Mazur, J. Driewer, H. Li

Sunday SU-E-T-477

IMPT Vs. VMAT: A Treatment Planning Study for High-Risk Prostate Cancer S. Rana*, Y. Zheng, C. Cheng

Sunday SU-E-T-478

IMRT Delivery Parameter Dependence of Dose-Mass Optimization M. Couto*, I. Mihaylov

Sunday SU-E-T-479

IMRT Plan Recalculation in Patient Based On Dynalog Data and the Effect of a Single Failing MLC Motor M. Morcos*, E. Mitrou

Sunday SU-E-T-480

IMRT/VMAT QA Employing a High Resolution Measurement Array: Initial Experience and Limitations M. Gainey*, R. Saum, T. Rothe, S. Knobe, J. Luebke, S. Kuechler, R. Wiehle, M. Kollefrath, G. Bruggmoser

Sunday SU-E-T-481

In Vivo and Post Mortem Animal Irradiation: Measured Vs. Calculated Doses P. Heintz, B. Heintz*, D. Sandoval, W. Weber, D. Melo, R. Guilmette

Sunday SU-E-T-482

In Vivo Dosimetry of An Anthropomorphic Phantom by Using the RADPOS System for Proton Beam Therapy R. Kohno*, H. Yamaguchi, K. Motegi, K. Hotta, S. Nishioka, T. Dohmae, T. Akimoto

Sunday SU-E-T-483

In Vivo Dosimetry of Conventional and Rotational Intensity Modulated Radiotherapy Using Integral Quality Monitor (IQM) L. Lin*, J. Qian, R. Gonzales, J. Keck, E. Armour, J. Wong

Sunday SU-E-T-484

In Vivo Dosimetry Tolerances in External Beam Fast Neutron Therapy L. Young, O. Gopan*

Sunday SU-E-T-485

In Vivo Dosimetry with EBT3 Radiochromic Films for TBI Treatments S. Lozares*, M. Gracia, J. Olasolo, N. Gallardo, N. Fuentemilla, S. Pellejero, S. Miquelez, F. Mañeru, M. Martin, L. Bragado, A. Rubio

Sunday SU-E-T-486

In Vivo Skin Dosimetry Using the Exradin W1 Plastic Scintillation Detector for Passively Scattered Proton Beam Therapy F. Alsanea*, L. Wootton, R. Kudchadker, M. Usama, S. Beddar

Sunday SU-E-T-487

In VMAT of Spine Stereotactic Radiosurgery a 1 Mm Grid Size Increases Dose Gradient and Lowers Cord Dose Significantly Relative to a 2.5 Mm Grid Size M. Liu*, K. Snyder, B. Zhao, N. Wen, Y. Huang, K. Song, H. Li, J. Kim, I. Chetty, S. Siddiqui

Sunday SU-E-T-488

Incorporating In-House Treatment Planning Software Into Clinical Auto-Planning Workflow W. Lu*, M. Chen, J. Tan, S. Jiang

Sunday SU-E-T-489

Incorporating Skin Flash Into VMAT WBI: Impacts On Surface Dosimetry A. Bejarano Buele*, S. Tanny, G. Warrell, E. Parsai

Sunday SU-E-T-490

Independent Three-Dimensional (3D) Dose Verification of VMAT/SBRT Using EPID and Cloud Computing A. Ding*, B. Han, K. Bush, L. Wang, L. Xing

Sunday SU-E-T-491

Influence of Applicator Dimensions On Doses to Bladder, Rectum and Sigmoid in HDR Brachytherapy for Cervical Cancer V. Dumane*, R. RHOME, Y. Yuan, V. Gupta

Sunday SU-E-T-492

Influence of Clipping PTV in Build-Up Region On IMRT Plan Quality and Deliverability S. Sharma*, D. Manigandan, P. Sahai, A. Biswas, V. Subramani, S. Chander, P. Julkha, G. Rath

Sunday SU-E-T-493

Influence of Filtered and Flatting Filter Free Photon Beam of 10 Megavolts Energy On Rapid Arc Radiotherapy Planning for Cervix Carcinoma Y. Girigesh*, K. Lalit, S. Kothanda Raman, M. MISHRA

Sunday SU-E-T-494

Influence of Proton Track-Cell Nucleus Incidence Angle On Relative Biological Effectiveness P. Pater*, G. Bäckstrom, S. Enger, F. Villegas, A. Ahnesjö, J. Seuntjens, I. El Naqa

Sunday SU-E-T-495

Influence of Reduced Target-To-Nozzle Distance On Secondary Neutron Dose Equivalent in Proton and Carbon Ion Radiotherapy Y. SHENG*, w. wang, M. Moyers, Y. Deng, Z. Huang, x. Liu, K. Shahnazi

Sunday SU-E-T-496

Influence of the Intrafraction Patient Repositioning On Spot Scanning Proton Therapy for Prostate Cancer Y. Fujii*, T. Matsuura, S. Takao, Y. Matsuzaki, T. Yamada, N. Miyamoto, S. Shimizu, K. Umegaki, H. Shirato

Sunday SU-E-T-497

Initial Characterization of a Novel 2D Computed Radiography (CR) Dosimeter for SBRT W. Crijns*, S. Ramaekers, P. Leblans, G. Defraene, F. Maes, K. Haustermans, T. Depuydt

Sunday SU-E-T-498

Initial Characterization of the New EBT XD Gafchromic Film M. Grams*, J. Gustafson, K. Long, L. Fong de los Santos

Sunday SU-E-T-499

Initial Developments of An OpenCL-Based Cross-Platform Monte Carlo Dose Engine for Carbon Ion Therapy N. Qin*, M. Pinto, Z. Tian, G. Dedes, A. Pompos, S. Jiang, K. Parodi, X. Jia

Sunday SU-E-T-500

Initial Implementation of GPU-Based Particle Swarm Optimization for 4D IMRT Planning in Lung SBRT A. Modiri*, A. Hagan, X. Gu, A. Sawant

Sunday SU-E-T-501

Initial Orthovoltage Beam Profile Analysis of a Small Brass MLC B. Loughery*, M. Snyder

Sunday SU-E-T-502

Initial Results of a Comparison of Treatment Plans Produced From Automated Prioritized Planning Method and a Commercial Treatment Planning System P. Tiwari*, L. Hong, A. Apte, J. Yang, J. Mechalakos, G. Mageras, M. Hunt, Y. Chen, J. Deasy

Sunday SU-E-T-503

Intensity Modulated Proton Therapy (IMPT) Versus Intensity Modulated X-Ray Therapy (IMRT) for Patient with Hepatocellular Carcinoma: A Dosimetric Comparison H. Singh*, L. Zhao, K. Prabhu, S. Rana, Y. Zheng

Sunday SU-E-T-504

Intensity-Modulated Radiosurgery Treatments Derived by Optimizing Delivery of Sphere Packing Treatment Plans M. Hermansen*, T. St. John, B. Velasco, F. Bova

Sunday SU-E-T-505

Inter-Comparison of Clinical Plans Created On Truebeam with Trilogy and Clinac M. Sharma*, Y. Wu, S. Kim

Sunday SU-E-T-506

Intercomparison Study On Small Field Output Factor Measurements C. Talamonti*, M. casati, A. Compagnucci, C. Arilli, D. Greto, L. Marrazzo, S. Pallotta, M. Zani, M. Marinelli, D. Menichelli, L. Scotti, G. Verona

Sunday SU-E-T-507

Internal Dosimetry in Nuclear Medicine Using GATE and XCAT Phantom: A Simulation Study M. Fallahpoor*, M. Abbasi, A. Sen, A. Parach, F. Kalantari

Sunday SU-E-T-508

Internal Organ Motion Effect On Radiation Dose to a Point Under Half-Beam Block Match Line S. Zhou*, X. Zhu, M. Zhang, D. Zheng, Y. Lei, Q. Zhang, S. Li, J. Driewer, S. Wang, C. Enke

Sunday SU-E-T-509

Inter-Observer and Inter-Modality Contouring Analysis for Organs at Risk for HDR Gynecological Brachytherapy P. Sadeghi*, R. Banerjee, M. Alghamdi, T. Phan, A. Taggar, W. Smith

Sunday SU-E-T-510

Interplay Between Spots Sizes, Spot / Line Spacing and Motion in Spot Scanning Proton Therapy T. Lee*

Sunday SU-E-T-511

Inter-Rater Variability in Classification of Incidents in a New Incident Reporting System D. Pappas*, S. Reis, A. Ali, A. Kapur

Sunday SU-E-T-512

Intrinsic Characteristics of the Nine Detectors and Evaluation of Their Performance in Non-Equilibrium Radiation Dosimetry M. Markovic*, S. Stathakis, I. Jurkovic, P. Mavroidis, N. Papanikolaou

Sunday SU-E-T-513

Investigating Dose of Internal Target Volume After Correcting for Tissue Heterogeneity in SBRT Lung Plans with Homogeneity Calculation P. Qi*, T. Zhuang, A. Magnelli, T. Djemil, Q. Shang, S. Balik, M. Andrews, K. Stephans, G. Videtic, P. Xia

Sunday SU-E-T-514

Investigating the Dose Distributions of Equiangular Spaced Noncoplanar Beams T. Mitchell*, P. Maxim, M. Hadsell, B. Loo

Sunday SU-E-T-515

Investigating the Linear Energy Transfer Dependency of Different PRESAGE Formulations in a Proton Beam M. Carroll*, M. Alqathami, A. Blencowe, G. Ibbott

Sunday SU-E-T-516

Investigation of a Novel Radiochromic Radiation Reporting System Utilizing the Reduction of Ferric Ion H. Lee*, M. Alqathami, J. Wang, A. Blencowe, G. Ibbott

Sunday SU-E-T-517

Investigation of Factors Contributing to Extracranial Radiation Doses From Leksell Gamma Knife D. Kon*, M. Nakano, K. Nawa, A. Haga, K. Nakagawa

Sunday SU-E-T-518

Investigation of Gold Nanoparticle Radiosensitization for Carbon Ion Therapy Y. Lin*, K. Held, S. McMahon, H. Paganetti, J. Schuemann

Sunday SU-E-T-519

Investigation of the CyberKnife MultiPlan Monte Carlo Dose Calculation Using EBT3 Film Absolute Dosimetry for Delivery in a Heterogeneous Thorax Phantom M. Lamberto*, H. Chen, K. Huang, F. Mourtada

Sunday SU-E-T-520

Investigation of the Impact of Respiratory Motion On Spine SAbR Dose Distributions R. Foster*, C. Ding, S. Jiang

Sunday SU-E-T-521

Investigation of the Uncertainties Involved in Secondary Neutron/gamma Production in Geant4/MCNP6 Monte Carlo Codes for Proton Therapy Application L. Mirzakhanian*, V. Giusti, S. Enger

Sunday SU-E-T-522

Investigation of Underdosage of Total Body Irradiation with Bilateral Irradiation Scheme T. Lin*, A. Eldib, M. Hossain, R. Price, C. Ma

Sunday SU-E-T-523

Investigation of Various MR-Compatible Shielding Materials for Direction Modulated Brachytherapy (DMBT) Tandem Applicator for Cervical Cancer Treatment H. Safigholi*, D. Han, A. Soliman, A. Meigooni, D. Scanderbeg, W. Song

Sunday SU-E-T-524

In-Vivo Diode Dosimetry Proton Therapy Range Verification Validation Study for Pediatric CSI A. Toltz*, M. Hoesl, J. Schuemann, J. Seuntjens, H. Lu, H. Paganetti

Sunday SU-E-T-525

Ionization Chamber Perturbation in Flattening Filter Free Beams D. Czarnecki, P. von Voigts-Rhetz, K. Zink*

Sunday SU-E-T-526

Irradiation of Human Cell Lines Using Carbon Ions: Real Time Dosimetry Using Gaf-Chromic Film Y. Lin*, C. La Tessa, A. Rusek, K. Held

Sunday SU-E-T-527

Is CTV-Based Robust Optimized IMPT in Non-Small-Cell Lung Cancer Robust Against Respiratory Motion? Y. Anetai*, H. Takegawa, T. Inoue, H. Mizuno, i. sumida, m. koizumi, k. ogawa, A. van't Veld, E. Korevaar

Sunday SU-E-T-528

Is It Essential to QA HDR Applicators Annually in Clinic? H. Xu*, X. Yang, B. Yi

Sunday SU-E-T-529

Is MFO-IMPT Robust Enough for the Treatment of Head and Neck Tumors? A 2- Year Outcome Analysis Following Proton Therapy On the First 50 Oropharynx Patients at the MD Anderson Cancer Center S. Frank*, A. Garden, M. Anderson, D. Rosenthal, W. Morrison, B. Gunn, C. Fuller, J. Phan, X. Zhang, F. Poenisch, R. Wu, H. Li, A. Gautam, N. Sahoo, M. Gillin, X. Zhu

Sunday SU-E-T-530

Knowledge-Based Treatment Planning and Its Potential Role in the Transition Between Treatment Planning Systems K. Masi*, P. Archer, D. Hamstra, M. Matuszak

Sunday SU-E-T-531

Large--Scale DVH Quality Study: Correlated Aims Lead Relaxations O. Nohadani*, A. Roy, I. Das

Sunday SU-E-T-532

Left-Sided Breast Cancer Irradiation Using Volumatric Modulated Arc Therapy: An Evaluation of Multiple Commercial Systems R. Liu*, T. Liu, S. Qi

Sunday SU-E-T-533

LET Dependence Correction of Radiochromic Films for Application in Low Energy Proton Irradiation S. Reinhardt*, M. Würl, C. Greubel, J. Wilkens, M. Hillbrand, A. Mairani, W. Assmann, K. Parodi

Sunday SU-E-T-534

Level of Residual Radioactivity of Activated Parts of a Decommissioned Cyclotron H. Choi*, T. Leung, T. Chiu, B. Yang, P. Wu, K. Cheung, S. Yu

Sunday SU-E-T-535

Linac Based Multiple SRS Targets Plan Evaluation: Understanding Conformity Index Generated Form BrainLab IPlan RT Dose 4.1 SRS Planning System D. Workie*, B. Hasson, C. Geraghty, A. Torano, L. Dad, Y. Mary

Sunday SU-E-T-536

LINAC-Based Single Isocenter Frameless SRT for Brain Metastases B. Liu*, L. Zhang, N. Rigor, J. Kim

Sunday SU-E-T-537

Local Multi-Criteria Optimization for Clinical Tradeoff Decision Guidance in RT Planning L. Yuan*, Q. Wu, Y. Sheng, J. Liu, A. Benitez, F. Yin, Y. Ge

Sunday SU-E-T-538

Lung SBRT Dosimetric Comparison of 3D Conformal and RapidArc Planning R. Jiang*, L. Zhan, E. Osei

Sunday SU-E-T-539

Maximum Energy of Helium and Carbon Ions Clinically Needed for Spine, Lung, Prostate and Pancreas Cancer A. Pompos*, H. Choy, X. Jia, S. Jiang, R. Timmerman

Sunday SU-E-T-540

MCNPX Simulation of Proton Dose Distributions in a Water Phantom C. Lee, Y. Lee, S. Chen*, B. Chiang, C. Tung, T. Chao

Sunday SU-E-T-541

Measurement of CT Density Model Variations and the Impact On the Accuracy of Monte Carlo (MC) Dose Calculation in Stereotactic Body Radiation Therapy for Lung Cancer H. Xiang*, B. Li, G. Russo, R. Behrman, H. Lu, H. Fernando, L. Kachnic

Sunday SU-E-T-542

Measurement of Internal Neutrons for Uniform Scanning Proton Beams M. Islam*, Y. Zheng, T. Collums, J. Monsoon, S. Rana, S. Ahmad, E. Benton

Sunday SU-E-T-543

Measurement of Neutron Activation From Different High Energy Varian Linear Accelerators T. Thatcher*, A. Meigooni, S. Madsen, R. Sudowe

Sunday SU-E-T-544

Microscopic Dose Enhancement of Gold Nanoparticles in Water for Proton Therapy: A Simulation Study M. Newpower*, S. Ahmad, Y. Chen

Sunday SU-E-T-545

MLC Distance Travelled as a Predictor for Motor Failure S. Stathakis*, D. Defoor, P. Linden, N. Kirby, P. Mavroidis, N. Papanikolaou

Sunday SU-E-T-546

Modeling and Validation of the a New Proton Therapy System Using a Monte-Carlo Environment Optimized for Protons K. Grantham*, E. Klein

Sunday SU-E-T-547

Modeling Biological Response to Proton Irradiation and Evaluating Its Potential Clinical Consequences R. Taleei*, C. Peeler, F. Guan, D. Patel, U. Titt, D. Mirkovic, D. Grosshans, R. Mohan

Sunday SU-E-T-548

Modeling of Breast IORT Using the Xoft 50 KV Brachytherapy Source and 316L Steel Rigid Shield W. Burnside, W. Burnside*

Sunday SU-E-T-549

Modeling Relative Biological Effectiveness of Protons for Radiation Induced Brain Necrosis D. Mirkovic*, C. Peeler, D. Grosshans, U. Titt, R. Taleei, R. Mohan

Sunday SU-E-T-550

Modulation Index for VMAT J. Park*, S. Park, J. Kim, H. Kim, J. Kim, J. Carlson, S. Ye

Sunday SU-E-T-551

Monitor Unit Optimization in Stereotactic Body Radiation Therapy for Stage I Lung Cancer B. Huang*, J. Lu

Sunday SU-E-T-552

Monte Carlo Calculation of Correction Factors for a Free-Air Ionization Chamber in Support of a National Air-Kerma Standard for Electronic Brachytherapy M. Mille*, P. Bergstrom

Sunday SU-E-T-553

Monte Carlo Calculation of Proton Bragg Peak Displacements in the Presence of Al2O3:C Dosimeters L. Young, F. Yang*

Sunday SU-E-T-554

Monte Carlo Calculation of Source Terms and Attenuation Lengths for Neutrons Produced by 50-200 MeV Protons On Brass J. Ramos-Mendez*, H. Paganetti, B. Faddegon

Sunday SU-E-T-555

Monte Carlo Evaluation of the Dose Calculation Algorithm of TomoTherapy for Clinical Cases in Dynamic Jaws Mode E. Sterpin*

Sunday SU-E-T-556

Monte Carlo Generated Dose Distributions for Orbital Irradiation Using a Single Anterior-Posterior Electron Beam and a Hanging Lens Shield D. Duwel*, M. Lamba, H. Elson, N. Kumar

Sunday SU-E-T-557

Monte Carlo Modeling of Philips RT-250 Orthovoltage Unit for Beam Spectrum Modulation F. Reynoso*, S. Cho

Sunday SU-E-T-558

Monte Carlo Photon Transport Simulations On GPU with Quadric Geometry y. chi*, Z. Tian, S. Jiang, X. Jia

Sunday SU-E-T-559

Monte Carlo Simulation of Cobalt-60 Teletherapy Unit Modeling In-Field and Out-Of-Field Doses for Applications in Computational Radiation Dosimetry H. Petroccia*, Z. Li, N. Mendenhall, W. Bolch

Sunday SU-E-T-560

Monte Carlo Simulation of the Neutron Radiation Field Around a Medical 18 MV Linac F. Horst, D. Czarnecki, K. Zink*

Sunday SU-E-T-561

Monte Carlo-Based Organ Dose Reconstruction Using Pre-Contoured Human Model for Hodgkins Lymphoma Patients Treated by Cobalt-60 External Beam Therapy J. Jung*, C. Lee, J. Kim, C. Pelletier, A. Pyakuryal, C. Lee

Sunday SU-E-T-562

Motion Tracking Optimization for Conformal Arc Radiotherapy Plans: A QUASAR Phantom Based Study Z. Xu, I. Wang*, R. Yao, M. Podgorsak

Sunday SU-E-T-563

Multi-Fraction Stereotactic Radiosurgery with Extend System of Gamma Knife: Treatment Verification Using Indigenously Designed Patient Simulating Multipurpose Phantom R. Bisht*, S. Kale, N. Gopishankar, G. Rath, P. Julka, D. Agarwal, M. Singh, A. Garg, P. Kumar, S. Thulkar, B. Sharma

Sunday SU-E-T-564

Multi-Helix Rotating Shield Brachytherapy for Cervical Cancer H. Dadkhah*, R. Flynn, X. Wu, Y. Kim

Sunday SU-E-T-565

Multiple Channel Radiochromic Film Calibration with Spatial Dose Gradient Regularization D. Li*, L. Lee, A. Chan

Sunday SU-E-T-566

Neutron Dose Cloud Map for Compact ProteusONE Proton Therapy J. Syh*, B. Patel, J. Syh, L. Rosen, H. Wu

Sunday SU-E-T-567

Neutron Dose Equivalent Evaluation for Pencil Beam Scanning Proton Therapy with Apertures C. Geng*, J. Schuemann, M. Moteabbed, H. Paganetti

Sunday SU-E-T-568

Neutron Dose Survey of a Compact Single Room Proton Machine Y. Chen*, M. Prusator, M. Islam, D. Johnson, S. Ahmad

Sunday SU-E-T-569

Neutron Shielding Calculation Using Analytical and Multi-Monte Carlo Method for Proton Therapy Facility S. Cho*, E. Shin, J. Kim, S. Ahn, K. Chung, D. Kim, Y. Han, D. Choi

Sunday SU-E-T-570

New Quality Assurance Method Using Motion Tracking for 6D Robotic Couches W. Cheon*, J. Cho, S. Ahn, Y. Han, D. Choi

Sunday SU-E-T-571

Newly Emerging Integrated Transmission Detector Systems Provide Online Quality Assurance of External Beam Radiation Therapy D. Hoffman*, E. Chung, C. Hess, R. Stern, S. Benedict

Sunday SU-E-T-572

Normal Lung Tissue Sparing in Radiation Therapy for Locally Advanced Non-Small Cell Lung Cancer C. Hong*, S. Ju, Y. Ahn

Sunday SU-E-T-573

Normal Tissue Dose Effect of Prescription Isodose Level Selection in Lung Stereotactic Body Radiation Therapy Q. Zhang*, Y. Lei, D. Zheng, X. Zhu, a. wahl, C. Lin, S. Zhou, w. zhen

Sunday SU-E-T-574

Novel Chance-Constrained Optimization in Intensity-Modulated Proton Therapy Planning to Account for Range and Patient Setup Uncertainties y. an*, J. Liang, W. Liu

Sunday SU-E-T-575

Novel Quality Assurance Procedure for the Small Animal Radiation Research Platform Using Commercial OSLDs J. Keller*, V. Lockamy, S. Glenn, A. Harrison

Sunday SU-E-T-576

Obesity as a Factor in Prostate Cancer Treatment Modality and Outcomes C. Njeh*, R. Stankowski, H. Liang, B. Kahana

Sunday SU-E-T-577

Obliquity Factor and Surface Dose in Proton Beam Therapy I. Das*, A. Andersen, L. Coutinho

Sunday SU-E-T-578

On Definition of Minimum and Maximum Dose for Target Volume Y. Gong*, J. Yu, Y. Xiao

Sunday SU-E-T-579

On the Relative Sensitivity of Monte Carlo and Pencil Beam Dose Calculation Algorithms to CT Metal Artifacts in Volumetric-Modulated Arc Spine Radiosurgery (RS) M. Wong*, V. Lee, O. Blanck, R. Leung, K. Lee, S. Tung, G. Law, M. Chan

Sunday SU-E-T-580

On the Significance of Model Based Dosimetry for Breast and Head and Neck 192Ir HDR Brachytherapy V. Peppa*, E. Pappas, E. Pantelis, T. Major, C. Polgar, P. Papagiannis

Sunday SU-E-T-581

On the Value of LET as a Radiation Quality Descriptor for RBE P. Pater*, G. Bäckstrom, S. Enger, F. Villegas, A. Ahnesjö, J. Seuntjens, I. El Naqa

Sunday SU-E-T-582

On-Line Dosimetric Verification of Respiratory Gated Volumetric Modulated Arc Therapy Using the Electronic Portal Imaging Device B. Schaly*, I. Xhaferllari, S. Gaede

Sunday SU-E-T-583

Operated Left Breast and Chest Wall Radiotherapy: A Dosimetric Comparison Between 3DCRT,IMRT and VMAT B. Sarkar*, S. Roy, A. Munshi, A. Pradhan

Sunday SU-E-T-584

Optical Tracking Guided Patient-Specific VMAT QA with ArcCHECK Q. Fan*, C. Park, B. Lu, B. Barraclough, S. Lebron, J. Li, C. Liu, G. Yan

Sunday SU-E-T-585

Optically-Stimulated Luminescent Dosimeters for Monitoring Pacemaker Dose in Radiation Therapy L. Apicello*, A. Riegel, A. Jamshidi

Sunday SU-E-T-586

Optimal Determination of Tolerance Level for Radiation Dose Delivery Verification in An in Vivo Dosimetry System Y. Chen*, S. Souri, G. Gill, A. Rea, A. Kuruvilla, A. Riegel, Y. Cao, A. Jamshidi

Sunday SU-E-T-587

Optimal Volumetric Modulated Arc Radiotherapy Treatment Planning Technique for Multiple Brain Metastases with Increasing Number of Arcs V. Keeling*, S. Hossain, K. Hildebrand, S. Ahmad, D. Larson, A. Sahgal, L. Ma

Sunday SU-E-T-588

Optimization of Imaging Following 223Ra Administration in Targeted Alpha-Emitting Radionuclide Therapy of Bone Metastases N. Benabdallah*, M. Bernardini, A. Desbrée, C. de Labriolle-Vaylet, D. Franck

Sunday SU-E-T-589

Optimization of Patient Head Angle Position to Spare Hippocampus During the Brain Radiation Therapy G. Cheon*, S. Kang, T. Kim, D. Kim, Y. KIM, T. Suh

Sunday SU-E-T-590

Optimizing Magnetic Field Strengths with Matlab for An Ion-Optic System in Particle Therapy Consisting of Two Quadrupole Magnets for Subsequent Simulations with the Monte-Carlo Code FLUKA K. Baumann, U. Weber, Y. Simeonov, K. Zink*

Sunday SU-E-T-591

Optimizing the Flattening Filter Free Beam Selection in RapidArc-Based Stereotactic Body Radiotherapy for Stage I Lung Cancer B. Huang*, J. Lu

Sunday SU-E-T-592

OSL Response of Al2O3:C Detectors Exposed to Therapeutic Proton Beams D. Granville*, D. Flint, G. Sawakuchi

Sunday SU-E-T-593

Outcomes and Toxicities From a Clinical Trial of APBI Using MERT+IMRT with the Same XMLC E. Jiménez-Ortega*, C. Míguez-Sánchez, B. Palma, A. Ureba, H. Miras del Río, R. Arráns Lara, A. Barbeiro, J. Baeza, F. Carrasco-Peña, A. Leal Plaza

Sunday SU-E-T-594

Out-Of-Field Neutron and Gamma Dose Estimated Using TLD-600/700 Pairs in the Wobbling Proton Therapy System Y. Chen*, Y. Lin, H. Chen, H. Tsai

Sunday SU-E-T-595

Output Factor Calculation for a Uniform Scanning Proton Therapy System D. Hecksel*, N. Stauffer, G. DeFillippo, J. Edwards, M. Pankuch

Sunday SU-E-T-596

P3DVHStats - a Novel, Automatic, Institution Customizable Program to Compute and Report DVH Quantities On Philips Pinnacle TPS C. Wu*

Sunday SU-E-T-597

Parameterization of the Photon Beam Dosimetry for a Commercial Linear Accelerator S. Lebron*, B. Lu, G. Yan, D. Kahler, J. Li, B. Barraclough, C. Liu

Sunday SU-E-T-598

Parametric Equation for Quick and Reliable Estimate of Stray Neutron Doses in Proton Therapy and Application for Intracranial Tumor Treatments A. Bonfrate*, J. Farah, L. De Marzi, S. Delacroix, J. Hérault, R. Sayah, C. Lee, W. Bolch, I. Clairand

Sunday SU-E-T-599

Patient Safety Enhancements Through a Study of R&V System Override Data K. Hendrickson*, S. Vimolchalao

Sunday SU-E-T-600

Patient Specific IMRT Verification Using a Phosphor-Screen Based Geometric QA System: A Preliminary Study M. Lee*, E. Hu, B. Yi

Sunday SU-E-T-601

Patient Specific QA Check for Radiotherapy with Carbon Beam at SAGA HIMAT T. Himukai*, Y. Tsunashima, M. Kanazawa, M. Mizota, Y. Shioyama, M. Endo

Sunday SU-E-T-602

Patient-Specific Online Dose Verification Based On Transmission Detector Measurements J. Thoelking*, S. Yuvaraj, F. Jens, F. Lohr, F. Wenz, H. Wertz, H. Wertz

Sunday SU-E-T-603

PBS Prostate Plan Robustness: A Tool for Patient Specific Setup Tolerance S. Tang*, L. Song, C. Chen, C. Chang, B. Chon, H. Tsai, E. Soffen, O. Cahlon, D. Mah

Sunday SU-E-T-604

Penumbra Characteristics of a New InCise™ Multileaf Collimator of CyberKnife M6™ System M. Hwang*, S. Jang, C. Ozhasoglu, R. Lalonde, D. Heron, M. Huq

Sunday SU-E-T-605

Performance Evaluation of MLC Leaf-Sequencing Algorithms in Head-And-Neck IMRT J. Jing, H. Lin, J. Chow*

Sunday SU-E-T-606

Performance of MR-Based 3D FXG Dosimetry for Preclinical Irradiation M. Welch*, D. Jaffray

Sunday SU-E-T-607

Performance Quantification of the Nine Detectors Used for Dosimetry Measurements in Advanced Radiation Therapy Treatments M. Markovic*, S. Stathakis, I. Jurkovic, P. Mavroidis, N. Papanikolaou

Sunday SU-E-T-608

Perturbation Corrections for Alanine Dosimeters in Different Phantom Materials in High-Energy Photon Beams P. von Voigts-Rhetz*, M. Anton, D. Czarnecki, K. Zink

Sunday SU-E-T-609

Perturbation Effects of Pedicle Screws On Radiotherapy Dose Distributions R. Bar-Deroma*, E. Borzov, A. Nevelsky

Sunday SU-E-T-610

Phosphor-Based Fiber Optic Probes for Proton Beam Characterization A. Darafsheh*, A. Soldner, H. Liu, A. Kassaee, T. Zhu, J. Finlay

Sunday SU-E-T-611

Photon and Neutron Peripheral Dose Ratio for Low (6 MV) and High (15 MV) Energy for Treatment Selection L. Irazola*, J. Terron, B. SANCHEZ-NIETO, M. Ortiz-Seidel, F. Sanchez-Doblado

Sunday SU-E-T-612

Photonuclear Activation of Prosthetic Hips in Radiotherapy S. Keehan*, R. Smith, J. Millar, M. Esser, M. Taylor, T. Kron, R. Franich

Sunday SU-E-T-613

Physics Considerations for Single-Isocenter Volumetric Modulated Arc Radiosurgery for Treatment of Multiple Intracranial Targets C. Stanhope*, Z. Chang, Z. Wang, F. Yin, G. Kim, J. Salama, J. Kirkpatrick, J. Adamson

Sunday SU-E-T-614

Plan Averaging for Multi-Criteria Navigation of Step-And-Shoot IMRT M. Guo*, D. Craft, H. Gao

Sunday SU-E-T-615

Plan Comparison Between Photon IMRT and Proton Plans Incorporating Uncertainty Analysis C. Cheng*, B. Wessels, F. Jesseph, D. Mattson, D. Mansur

Sunday SU-E-T-616

Plan Quality Assessment of Both Treatment Planning System Dose and Measurement-Based 3D Reconstructed Dose in the Patient A. Olch*

Sunday SU-E-T-617

Plan Quality Estimation of Intensity-Modulated Radiotherapy Cases for Lung Cancer J. Koo*, M. Yoon, W. Chung, D. Kim

Sunday SU-E-T-618

Plan Robustness Study of Volumetric-Modulated Arc Therapy Vs. Intensity-Modulated Radiation Therapy for Head and Neck Cancer W. Liu*, S. Patel, J. Shen, D. Harrington, J. Stoker, X. Ding, Y. Hu, W. Wong, M. Halyard, S. Schild, G. Ezzell, M. Bues

Sunday SU-E-T-619

Planning 131I Thyroid Treatments for Patients Requiring Hemodialysis D. Stroud*

Sunday SU-E-T-620

Planning and Dosimetry for Pulsed Low Dose Rate RT for Recurrent Lung, Spine, GYN and Head and Neck Cancers X. Tong*, F. Luo, Y. Liu, W. Zhang, Q. Xu, T. Zhang, J. Li, L. Chen, C. Ma

Sunday SU-E-T-621

Planning Methodologies for Cancer of the Anal Canal: Comparing IMRT, Rapid Arc, and Pencil Beam Scanning Proton Beam J. McGlade*, A. Kassaee

Sunday SU-E-T-622

Planning Technique for Passively-Scattered Involved-Node Proton Therapy of Mediastinal Lymphoma with Consideration of Cardiac Motion S. Flampouri*, Z. Li, B. Hoppe

Sunday SU-E-T-623

Polarity Effects for Small Volume Ionization Chambers in Cobalt-60 Beams A. Xu*, J. Bhatnagar, M. Huq

Sunday SU-E-T-624

Portal Dosimetry Commissioning of Multiple (6) Varian TrueBeam Linacs Equipped with PortalVision DMI MV Imager M. Weldon*, D. DiCostanzo, S. Grzetic, J. Hessler

Sunday SU-E-T-625

Potential for Reduced Radiation Induced Toxicity for the Treatment of Inoperable Non-Small-Cell Lung Cancer Using RapidArc Planning D. Pokhrel*, S. Sood, R. Badkul, H. Jiang, H. Saleh, F. Wang

Sunday SU-E-T-626

Practical Method to Implement Arc Therapy Using Scanned Particle Beams J. Eley*, M. Mehta, J. Molitoris, U. Langner, K. Langen

Sunday SU-E-T-627

Precision Modelling of the Leaf-Bank Rotation in Elekta's Agility MLC: Is It Necessary? M. Vujicic*, J. Belec, E. Heath, S. Gholampourkashi, J. Cygler

Sunday SU-E-T-628

Predicted Risk of Post-Irradiation Cerebral Necrosis in Pediatric Brain Cancer Patients: A Treatment Planning Comparison of Proton Vs. Photon Therapy D. Freund*, R. Zhang, W. Newhauser, M. Sanders

Sunday SU-E-T-629

Prediction of the ViewRay Radiotherapy Treatment Time for Clinical Logistics S. Liu*, H. Wooten, Y. Wu, D. Yang

Sunday SU-E-T-630

Predictive Modeling of Mortality, Tumor Control, and Normal Tissue Complications After Stereotactic Body Radiotherapy for Stage I Non-Small Cell Lung Cancer W. Lindsay*, C. Berlind, J. Gee, C. Simone

Sunday SU-E-T-631

Preliminary Results for Analytical Investigation Into Effects of ArcCHECK Setup Errors S. Kar*, C. Tien

Sunday SU-E-T-632

Preliminary Study On Treating Nose Skin Using Energy and Intensity Modulated Electron Beams with Monte Carlo Based Dose Calculations L. Jin*, A. Eldib, J. Li, R. Price, C. Ma

Sunday SU-E-T-634

Pre-Verification of FFF Prostate VMAT Plans with Gamma Method and DVHs Reconstructed Based On Measurements with 2D-ARRAY (PTW 1500) and OCTAVIUS 4D M. Kruszyna*, M. Adamczyk

Sunday SU-E-T-635

Process Mapping of Eye Plaque Brachytherapy J. Huynh*, Y. Kim

Sunday SU-E-T-636

ProteusONE Machine QA Procedure and Stabiity Study: Half Year Clinical Operation D. Freund*, X. Ding, H. Wu, J. Zhang, J. Syh, J. Syh, B. Patel, X. Song

Sunday SU-E-T-637

Proton Aperture Quality Assurance Using Computed Tomography M. Reyhan*, N. Yue, J. Zou

Sunday SU-E-T-638

Proton Beam Delivery to a Moving Lung Tumor and Monte Carlo Simulation with TOPAS M. Coruh*, N. Demez, L. Ewell

Sunday SU-E-T-639

Proton Dose Calculation for Irregular Motion Using a Sliding Interface J. Phillips*, G. Gueorguiev, C. Grassberger, H. Paganetti, G. Sharp

Sunday SU-E-T-640

Proton Modulated Arc Therapy Using Scanned Pencil Beams A. Carabe-Fernandez*, M. Kirk, D. Sanchez-Parcerisa, M. Fager, B. Burgdorf, M. Stowe, T. Solberg

Sunday SU-E-T-641

Proton Range Measurements Using a Geometrically Calibrated Liquid Scintillator Detector C. Hui*, D. Robertson, F. Alsanea, S. Beddar

Sunday SU-E-T-642

PTV Is the Voxel-Wise Worst-Case of CTV in Prostate Photon Therapy D. Harrington*, S. Schild, W. Wong, S. Vora, W. Liu

Sunday SU-E-T-643

Pure Alanine Dosimeter for Verification Dosimetry in IMRT A. Al-Karmi*, F. Zraiqat

Sunday SU-E-T-644

QuAArC: A 3D VMAT QA System Based On Radiochromic Film and Monte Carlo Simulation of Log Files A. Barbeiro*, A. Ureba, J. Baeza, R. Linares, E. Jiménez-Ortega, J. Mateos, S. Velazquez, A. Leal Plaza

Sunday SU-E-T-645

Qualification of a 2D Ionization Chamber Array for Beam Steering and Profile Measurement S. Gao*, P. Balter, M. Rose, W. Simon

Sunday SU-E-T-646

Quality Assurance of Truebeam Multi-Leaf Collimator Using a MLC QA Phantom J. Zhang*, D. Hong, J. Lu

Sunday SU-E-T-647

Quality Assurance of VMAT by Gamma Analysis Dependence On Low-Dose Threshold J. Song*, M. Kim, S. Park, S. Lee, M. Lee, T. Suh

Sunday SU-E-T-648

Quality Assurance Using the RADPOS System for 4D Radiotherapy with CyberKnife R. Marants*, E. Vandervoort, J. Cygler

Sunday SU-E-T-649

Quality Assurances for Proton Therapy Delivery Equipment B. Arjomandy*, E. Klein, P. Taylor, C. Ainsley, S. Safai, N. Sahoo, M. Pankuch, S. Park, J. Farr, Y. Kase, J. Flanz, E. Yorke, D. Followill

Sunday SU-E-T-650

Quantification and Modeling of the Dosimetric Impact of the IBEAM Evo Treatment Couchtop EP (Elekta) in VMAT R. Zhang, W. Bai*, J. Fleckenstein

Sunday SU-E-T-651

Quantification of Dosimetric Accuracy of Respiratory Gated Stereotactic Body Radiation Therapy T. Rajesh*, N. Arunai, S. Sujit, A. Sigamani, Y. Girigesh, S. Kothanda Raman, S. Vikraman, K. Tejinder, S. Maragathaveni, N. Dhivya

Sunday SU-E-T-652

Quantification of Dosimetric Uncertainty of I-125 COMS Eye Plaque C. Ferreira*, S. Ahmad, B. Firestone, D. Johnson, C. Matthiesen, T. De La Fuente Herman

Sunday SU-E-T-654

Quantifying Plan Quality Can Effectively Distinguish Between Competing Equivocal IMRT Prostate Plans A. Price*, J. Lo, S. Das

Sunday SU-E-T-655

Quantifying the Dosimetric Characteristics of a Calypso Compatible Radiotherapy Treatment Couch with Angular Transmission Functions J. Duan*, S. Shen, X. Wu, R. Popple, R. Cardan, M. Huang, F. Tannazi, I. Brezovich

Sunday SU-E-T-656

Quantitative Analysis of Proton Boron Fusion Therapy (PBFT) in Various Conditions D. Yoon*, J. Jung, H. Shin, M. Kim, H. Jang, T. Suh

Sunday SU-E-T-657

Quantitative Assessment of Plan Robustness for Helical Tomotherapy for Head and Neck Cancer Radiotherapy J. Matney*, J. Lian, E. Chao, B. Chera, L. Marks, S. Das

Sunday SU-E-T-658

Quantitative Comparison of VMAT Arc Geometry for Locally Advanced Lung Cancer with Large PTVs T. Zhu*, J. Wilkinson, P. Burger, M. Matuszak

Sunday SU-E-T-659

Quantitative Evaluation of Patient Setup Accuracy of Stereotactic Radiotherapy with the Frameless 6D-ExacTrac System Using Statistical Modeling V. Keeling*, H. Jin, S. Hossain, O. Algan, S. Ahmad, I. Ali

Sunday SU-E-T-660

Quantitative Fault Testing for Commissioning of Proton Therapy Machines M. Reilly*, L. Rankine, K. Grantham, E. Klein

Sunday SU-E-T-661

Quantitative MRI Assessment of a Novel Direction-Modulated Brachytherapy Tandem Applicator for Cervical Cancer A. Soliman*, A. Elzibak, A. Fatemi, H. Safigholi, D. Han, E. Leung, A. Ravi, W. Song

Sunday SU-E-T-662

Quick and Efficient Daily QA for Compact PBS Proton Therapy Machine B. Patel*, J. Syh, X. Ding, J. Syh, X. Song, D. Freund, H. Wu

Sunday SU-E-T-663

Radiation Properties of a Water-Equivalent Material Formulated Using the Stoichiometric Analysis Method in Heavy Charged Particle Therapy I. Yohannes*, S. Hild, S. Vasiliniuc, O. Langner, C. Graeff, C. Bert

Sunday SU-E-T-664

Radiobiological Modeling of Prophylactic Cranial Irradiation in Mice D. Smith*, B. Debeb, W. Woodward

Sunday SU-E-T-665

Radiochromic Film Quenching Effect Reduction for Proton Beam Dosimetry S. Aldelaijan*, F. Alzorkany, B. Moftah, F. Alrumayan, J. Seuntjens, D. Lewis, S. Devic

Sunday SU-E-T-666

Radionuclides and Activity of the Patient Apertures Used in a Proton Beam of Wobbling System B. Wang*, H. Chen, H. Tsai, R. Sheu

Sunday SU-E-T-667

Radiosensitization Due to Gold Nanoparticles: A Monte Carlo Cellular Dosimetry Investigation of An Expansive Parameter Space M. Martinov*, R. Thomson

Sunday SU-E-T-668

Radiosensitizing Effect of Bosutinib On Prostate and Colon Cancers: A Pilot in Vitro Study B. Wang*, D. Cvetkovic, C. Wang, L. Chen, C. Ma

Sunday SU-E-T-669

Radiosurgery Failure for Trigeminal Neuralgia: A Study of Radiographic Spatial Fidelity J. Howe*, A. Spalding

Sunday SU-E-T-670

Radiotherapy Vault Shielding Evaluation Method for a Flattening Filter-Free (FFF) Linac-Practical Considerations and Recommendations D. Mihailidis*

Sunday SU-E-T-671

Range-Modulation Effects of Carbon Ion Beams in Lung Tissue M. Witt, U. Weber, Y. Simeonov, K. Zink*

Sunday SU-E-T-672

Real-Time In Vivo Dosimeters Using LiPCDA and Optical Fibers A. Rink*, A. Croteau, S. Caron, O. Mermut, D. Jaffray

Sunday SU-E-T-673

Recent Developments and Comprehensive Validations of a GPU-Based Proton Monte Carlo Simulation Package, GPMC N. Qin*, D. Giantsoudi, Z. Tian, J. Schuemann, A. Pompos, H. Paganetti, S. Jiang, X. Jia

Sunday SU-E-T-674

Relationship Between Conformity Indices and Treatment Characteristics in Cone Based Linac Stereotactic Radiosurgery K. Li*

Sunday SU-E-T-675

Remote Dosimetry with a Novel PRESAGE Formulation S. Mein*, T. Juang, J. Malcolm, J. Adamovics, M. Oldham

Sunday SU-E-T-676

Reproducibility and Consistency of Two SunNuclear 3D Scanning Tanks J. Hessler*, D. DiCostanzo, S. Grzetic, A. Ayan, N. Gupta, J. Woollard

Sunday SU-E-T-677

Reproducibility of Production of Ionization Chambers P. Kukolowicz*, W. Bulski, P. Ulkowski

Sunday SU-E-T-678

Response Calibration Using Electron Depth-Dose Data for MRI-Based 3D Polymer Gel Dosimetry Y. Watanabe*, L. Warmington, N. Gopishankar

Sunday SU-E-T-679

Retrospective Analysis of the Sensitivity of Planar Dose Measurements To Gamma Analysis Criteria S. Elguindi*, G. Ezzell, J. Gagneur

Sunday SU-E-T-680

Rigid Registration Image Fusion for Volumetric Dose Evaluation of Gynecological Patients Treated with EBRT and HDR Brachytherapy J. Cantley*, D. Albani, R. Ellis, T. Sherertz, K. Herrmann, T. Podder

Sunday SU-E-T-681

Robust and Monte Carlo-Based Intensity Modulated Proton Therapy Optimization with GPU Acceleration J. Ma*, C. Beltran, H. Wan Chan Tseung, M. Herman

Sunday SU-E-T-682

Robust Fluence Map Optimization Via Alternating Direction Method of Multipliers with Automatic Parameter Optimization H. Gao*

Sunday SU-E-T-683

Robustness Analysis of Multiple Filed Optimized IMPT Plans for Head & Neck Patients Treated at MD Anderson Cancer Center Y. Li*, H. Li, W. Jingqian, X. Zhu, Y. Li, S. Frank, X. Zhang

Sunday SU-E-T-684

Robustness Versus Plan Quality for IMPT B. Gorissen*, N. Depauw, J. Unkelbach

Sunday SU-E-T-685

Root Cause Analysis of in Vivo Dosimetry Controls for Dynamic Arc Treatments S. Celi*, C. Wessels, P. François

Sunday SU-E-T-686

SBRT 4-Dimensional Treatment Planning for Vero Dynamic Tumor Tracking Lung Patients Z. Su*, R. Dagan, Z. Li

Sunday SU-E-T-687

Scatter Factors Comparison of 6MV FFF and Energy Matched 6MV EqFFF A. Sigamani*, N. Arunai, S. Sujit, Y. Girigesh, T. Rajesh, S. Kothanda Raman, K. Karunakaran, N. Subramanian, K. Meerza

Sunday SU-E-T-688

Secondary MU Calculation for Flattening Filter Free (FFF) Photon Beams M. Kim*, T. Zhu

Sunday SU-E-T-689

Semi-Automated GPU-Based Monte Carlo Dose Calculation for Total Body Irradiation M. Folkerts*, L. Ouyang, X. Jia, S. Jiang, X. Gu

Sunday SU-E-T-690

Sensitivity Analysis to Machine Error: Comparisons of VMAT QA Systems B. Liang*, B. Liu, F. Yin, F. Zhou, Q. Wu

Sunday SU-E-T-691

Shielding Evaluation of a Treatment Room with An Electronic Brachytherapy System B. Ibanez-Rosello*, B. Ibanez-Rosello, J. Bautista, C. Candela-Juan, J. Villaescusa, F. Ballester, J. Perez-Calatayud

Sunday SU-E-T-692

Should the Machine-Related Range Shifter (MRS) Be Replaced by a Patient-Related Range Shifter (PRS) to Preserve the Scanning Beam Dosimetric Advantages? H. Lin*, J. Shen, J. McDonough, Z. Tochner, S. Both

Sunday SU-E-T-693

Should We Use RapidArc (VMAT) for Breast Treatments? A Dosimetric Comparison of IMRT Versus VMAT Optimization in Whole Breast Irradiation of Early Stage Breast Cancer N. Moshiri Sedeh*, S. Pella, T. Leventouri, D. Littlejohn, T. Costantino

Sunday SU-E-T-694

Significant Skin Dose Differences Between IMRT and VMAT and Between Boost and Integrated Treatment Regimens for Treating Head and Neck and Other Cancer Site Patients G. Penoncello*, G. Ding

Sunday SU-E-T-695

Silicon Diode Measurements of Output Field Size Factors for Proton Pencil Beam Scanning with a Dedicated Nozzle J. McGlade*, L. Lin, T. Solberg

Sunday SU-E-T-696

Similar-Case-Based Framework of Beam Angle Configurations Using Treatment-Plan-Related Features in Lung Stereotactic Body Radiation Therapy M. Imai*, H. Arimura, A. Nonaka, K. Nakamura, Y. Shioyama, H. Honda, H. Hirata

Sunday SU-E-T-697

Simple and Efficient Modeling of the Varian TrueBeam Linac Using the GATE Monte Carlo Platform B. Roth*, N. Ploquin, J. Wiebe

Sunday SU-E-T-698

Simplified Pencil Beam Kernel For Unfiltered Energies M. Erturk*, C. Kocar, M. Tombakoglu, S. Gurdalli

Sunday SU-E-T-699

Simulation of Bone Tissue Interface to Study Perturbation Effect in Gamma Knife Radiosurgery N. Gopishankar*, s. vivekanandhan, S. Kale, G. Rath, R. Bisht, B. Sharma

Sunday SU-E-T-700

Single Isocenter Volumetric Modulated Arc Therapy (VMAT) and Intensity Modulated Radiotherapy (IMRT) for Intact Left Breast Cancer Patients with Internal Mammary (IM) and Supraclavicular (S/C) Nodes - a Treatment Planning Study G. Lee, O. Algan, V. Keeling, C. Higby, S. Ahmad, S. Hossain*

Sunday SU-E-T-701

Single Isocenter Volumetric Modulated Arc Therapy (VMAT) With Or Without Field Overlap in the Treatment of Left Sided Breast and Regional Lymphatic Tissue: Impact On Surrounding OAR Doses O. Algan, S. Hossain*, G. Lee, S. Ahmad

Sunday SU-E-T-702

SIR-Spheres Dose Vial Activity Assay Cross-Calibration with An Outside Radiopharmacy D. Gress*, W. Erwin

Sunday SU-E-T-703

Site Specific Image-Guided Radiotherapy (IGRT) Tolerances for Patient Safety K. Wijesooriya*, K. Seitter, I. Dharia, P. Read, J. Larner

Sunday SU-E-T-704

Skin Dose in Proton Pencil Beam Scanning for Pediatric Patients M. Axente*, V. Moskvin, J. Shin, P. Tsiamas, T. Merchant, J. Farr

Sunday SU-E-T-705

Skin Dosimetry Comparisons of CyberKnife and Tomotherapy for Head-And-Neck Stereotatic Body Radiotherapy J. Yoon*, J. Woo, J. Park, S. Cho, E. Lee, W. Choi, K. Park, H. Lee

Sunday SU-E-T-706

Small Field Dosimetry: Output Factors for Fixed Cones, Iris Collimator and MLC Fields for the CyberKnife M6™ System with Newly Released InCise™ Multileaf Collimator M. Huq*, Y. Zhang, C. Ozhasoglu, S. Jang, D. Heron, R. Lalonde

Sunday SU-E-T-707

Soft-Tissue / Bone Interface Backscatter Prediction by Two Commercial Electron Treatment Planning Algorithms B. Catt*, M. Yudelev

Sunday SU-E-T-708

Spatial Accuracy of Small-Target SRS Using Conebeam CT Guidance and Static Arcs with MLC-Defined Fields I. Brezovich*, R. Popple, J. Duan, X. Wu, S. Shen, M. Huang, R. Cardan

Sunday SU-E-T-709

Spatial Resolution Requirements for Fragment Identification in a Carbon Ion Spread Out Bragg Peak R. McBeth*, T. Borak

Sunday SU-E-T-710

Study of Dosimetric Leaf Gap and Transmission Factor Variations Affecting Common Clinical QA Tools J. Monroe*, C. Bull

Sunday SU-E-T-711

Study of the Correlation Between the Anatomic Features of PTV and the Whole Lung DVH in Esophagus Cancer IMRT Plans J. Duan*

Sunday SU-E-T-712

Study of the Linear-Quadratic-Linear and Universal-Survival- Curve Models for Lung SBRT Using BED and EQD2 Concepts T. Kehwar*, K. Chopra, B. Sood

Sunday SU-E-T-713

Study On Application of Beam Angle Optimization for Multiple Intracranial Metastases X. Lin, t. sun*, Y. Yin

Sunday SU-E-T-714

Study On Set-Up Accuracy of Three Different Immobilization Methods in Radiotherapy for Thoracic Cancer J. Chen*, Q. Peng, L. Chen, Y. Yin

Sunday SU-E-T-715

Subacute Effects of Pulsed Low Dose Rate Radiotherapy and Conventional Radiotherapy On Normal Mouse Tissues D. Cvetkovic*, B. Wang, L. Chen, C. Ma

Sunday SU-E-T-716

Suitability Study of a Unique 3D Dosimeter for Commissioning Radiation Treatment Machines Y. Roed*, R. Tailor, L. Pinsky, G. Ibbott

Sunday SU-E-T-717

Surface Coating for Prevention of Metallic Seed Migration in Tissues H. Lee, W. Lee, J. Park*, Y. Choy, S. Ye

Sunday SU-E-T-718

Surface Dose and Build-Up Dose Comparison of 6MV and 10MV Flattened with 6MV FFF and 10MV FFF Photon Beams with Different Detectors N. Arunai*, A. Sigamani, K. Karunakaran, T. Rajesh, K. Srinivasan, N. Subramanian, K. Meerza

Sunday SU-E-T-719

Surface Dose Evaluation of the Equivalent Quality Flattening Filter-Free Photon Beams M. MESHRAM*, S. Pramanik, R. C P, M. MESHRAM

Sunday SU-E-T-720

Surface Electronic Brachytherapy Dosimetry: Comparison and Uncertainty Evaluation of Different Calibration Protocols and Ionization Chambers C. Candela-Juan*, T. García-Martínez, Y. Niatsetski, J. Schuurman, G. Nauta, J. Vijande, Z. Ouhib, F. Ballester, J. Perez-Calatayud

Sunday SU-E-T-721

Systematic Dose Discrepancy of Diode Based In-Vivo Dosimetry Due to Short Source-To-Surface Distance and Oblique Beam Angle Incidence F. Chen*, M. Rao, D. Cao, J. Wu, J. Ye

Sunday SU-E-T-722

Technical and Clinical Experience with the 1st Single Room Proton Therapy System E. Klein*, T. Zhao, B. Sun, S. Goddu, L. Santanam, J. Bradley

Sunday SU-E-T-723

Testing Critical Structure Avoidance: End-To-End Verification Using the MAX-HD Phantom K. Shay, D. Myers, J. Gersh*

Sunday SU-E-T-724

Testing the Limitations of a Photon Dose Algorithm in Commissioning J. Xue*, M. Choi, J. Park, T. LaCouture, G. Ibbott

Sunday SU-E-T-725

The Analysis of Different Diagonal Profiles Used for Commissioning in Eclipse H. Mabhouti*, H. Acar, N. Kucuk, E. Kucukmorkoc, M. Doyuran, M. Caglar, A. Altinok, M. CEBE, G. YILIDIR, H. Caglar

Sunday SU-E-T-726

The Analysis of Different Percentage Depth Dose Curves Used for Commissioning in Eclipse M. CEBE*, H. Acar, N. Kucuk, E. Kucukmorkoc, M. Doyuran, M. Caglar, A. Altinok, G. YILIDIR, H. Mabhouti, H. Caglar

Sunday SU-E-T-727

The Application of Regularization-Based Multi-Channel Radiochromic Film Dosimetry for Patient-Specific QA of Stereotactic Body Radiation Therapy (SBRT) Treatment D. Li*, K. Chan, L. Lee, A. Chan

Sunday SU-E-T-728

The Comparison of Risk of Secondary Malignancies Arising From Five Different Whole Breast Radiation Treatments D. Kim*, E. Han, N. Paudel, M. HARDEE, W. Chung, J. Sung, M. Yoon

Sunday SU-E-T-729

The Dosimetric Impact of Moving Small Size Lung Tumor Using Helical Tomotherapy P. Tu*, H. Nien, H. Lee, C. Wu, C. Lin, C. Lin

Sunday SU-E-T-730

The Dosimetry Variation Sourced From Different Kinds of TPSs Should Be Pay Attention in Adaptive Radiation Therapy of Non-Small Cell Lung Carcinoma SBRT J. Duan*

Sunday SU-E-T-731

The Effect of Thermoplatic Mask to the Surface Dose in Sterotactic Brain Treatments with Flattening Filter Free Beams with EBT3 Gafchromic Film and OSL Dosimeter G. YILIDIR*, H. Acar, N. Kucuk, E. Kucukmorkoc, M. Doyuran, M. Caglar, A. Altinok, M. CEBE, H. Mabhouti, H. Caglar

Sunday SU-E-T-732

The Effects of Calcification Modeling for Monte Carlo Dose Calculations of Low Dose Rate Prostate Brachytherapy J. Sutherland*, N. Miksys, P. Soubiran, J. Cygler, R. Thomson

Sunday SU-E-T-733

The Effects of Duty Cycle On Gated VMAT Delivery C. Song*, C. Xue, R. Li, T. Xue

Sunday SU-E-T-734

The Feasibility of Using Polymer Gel Dosimetry to Measure the Dose Around Thin High Z Materials Irradiated with High Energy Photon Beams L. Warmington*, Y. Watanabe

Sunday SU-E-T-735

The Feasibility of Using A Knowledge Base of Prior Treatment Plans in Cervical Cancer: A Dosimetric Comparision with Original Plans C. Ma*, Y. Yin

Sunday SU-E-T-736

The Impact of Beam Angle Optimization of Intensity-Modulated Radiotherapy for Postoperative Radiotherapy of Cervical Cancer t. sun*, Y. Yin, X. Lin, T. liu, g. zhang

Sunday SU-E-T-737

The Impact of the Size of Custom Lead Shields On the Dosimetry of Electron Beam Therapy G. Georgiev*, K. Jacobs, D. Zuro, Y. Kim

Sunday SU-E-T-738

The Limit of Detectability and Resolution of a Cylindrical Diode Array Phantom for VMAT and SRS Quality Assurance T. Gray*, D. Pearson

Sunday SU-E-T-739

The Logistic Regression and Cox Regression Model for Predicting Local Recurrence, Distant Metastases, and Overall Survival of Rectal Cancer Patients z. zhou*, z. zhang, W. Hu, H. Zhong, J. Wang

Sunday SU-E-T-740

The Optimization in Segment Numbers for Nasopharyngeal Carcinoma (NPC) Treated by Intensity Modulated r. qiu*, y. wang, Z. Chi

Sunday SU-E-T-741

The Resources and Cost to Operate An Intraoperative Radiation Therapy Program for Accelerated Partial Breast Irradiation Using a Low-Energy X-Ray Source M. Morales*, G. Ding

Sunday SU-E-T-742

The Risk of Secondary Malignancies as An Evaluation Factor in the Comparison of Prostate Cancer Intensity Modulated Radiotherapy (IMRT) and Conformal Radiotherapy (CRT) Treatment Plans G. Komisopoulos*, C. Buckey, S. Stathakis, G. Sakellaropoulos, D. Kardamakis, G. Nikoforidis, N. Papanikolaou, P. Mavroidis

Sunday SU-E-T-743

The Simple Monitor Unit Calculation for Irregular Field in Passive Proton Beam T. Yamakawa*, N. Hayashi, H. Hamano, K. Yasui, H. Kato

Sunday SU-E-T-744

The Study of Total Marrow Irradiation Based On Rotational Intensity-Modulated Techniques S. Xu*, C. Xie, B. Qu, W. Yu, W. Xu, R. Ge, X. Cong

Sunday SU-E-T-745

The Use of Electron Dense Materials for Quality Assurance Testing in a Magnetic Field H. van Zijp*, B. van Asselen, W. de Vries, K. Ishakoglu, E. Beld, J. Kok, J. Wolthaus, J. Lagendijk, B. Raaymakers

Sunday SU-E-T-746

The Use of Radiochromic Film Analyzed with Three Channel Dosimetry as a Secondary Patient-Specific QA Tool for Small SBRT Fields M. Hadsell*, C. Holcombe, E. Chin, A. Hsu

Sunday SU-E-T-747

The Use of the EQD2 Formalism and Repair Estimates in the Re-Irradiation Setting and Correlation with Patient Follow-Up Data R. Price*, J. Meyer, E. Horwitz, C. Ma

Sunday SU-E-T-748

Theoretical Investigation On Using High Energy Proton Beam for Total-Body-Irradiation M. Zhang*, J. Zou, T. Chen, N. Yue

Sunday SU-E-T-749

Thorough Calibration of MOSFET Dosimeters D. Plenkovich*, J. Thomas

Sunday SU-E-T-750

Three Dimensional in Silico Study of Brachytherapy Application with In-Situ Dose-Painting Administered Via Gold-Nanoparticle Eluters N. Sinha*, G. Cifter, W. Ngwa

Sunday SU-E-T-751

Three-Component Kinetic Model of Tumor Growth and Radiation Response for Stereotactic Radiosurgery Y. Watanabe*, E. Dahlman, K. Leder, S. Hui

Sunday SU-E-T-752

Three-Dimensional Carcinogenic Maps Induced by Photons and Protons V. Manem*, H. Paganetti

Sunday SU-E-T-753

Three-Dimensional Dose Distributions of Incident Proton Particle in the Polymer Gel Dosimeter and the Radiochromic Gel Dosimeter: A Simulation Study with MCNP Code M. Park*, G. Kim, Y. Ji, K. Kim, S. Park, h. jung

Sunday SU-E-T-754

Three-Dimensional Patient Modeling Using Photogrammetry for Collision Avoidance R. Popple*, R. Cardan

Sunday SU-E-T-755

Timing Characteristics of Proton and Carbon Ion Treatments Using a Synchrotron and Modulated Scanning J. Zhao*, Y. Li, L. Sun, Z. Huang, Y. Deng, M. Moyers, W. Hsi, X. Wu

Sunday SU-E-T-756

Tissue Inhomogeneity Corrections in Intra-Operative Radiotherapy A. Sethi*, B. Chinsky, S. Gros, A. Diak, J. Roeske, B. Emami, W. Small

Sunday SU-E-T-757

TMRs Calculated From PDDs Versus the Direct Measurements for Small Field SRS Cones H. Li*, H. Zhong, K. Song, Y. Qin, K. Snyder, J. Gordon, I. Chetty, N. Wen

Sunday SU-E-T-758

To Determine the Source Dwell Positions of HDR Brachytherapy Using 2D 729 Ion Chamber Array S. Kumar*, S. GP

Sunday SU-E-T-759

To Replan Or Not To Replan for Each Fraction Using Inverse Optimization for Multichannel Vaginal Cylinder M. Balik*, M. Rybak, M. Andrews, M. Strongosky, H. Blair, B. Obi, C. Vermont

Sunday SU-E-T-760

Tolerance Design for Site-Specific Range in Proton Patient QA Process Using the Six Sigma Model J. LAH*, D. Shin, G. Kim

Sunday SU-E-T-761

TOMOMC, A Monte Carlo-Based Planning VerificationTool for Helical Tomotherapy O. Chibani*, C. Ma

Sunday SU-E-T-762

Toward Volume-Based Independent Dose Verification as Secondary Check H. Tachibana*, R. Tachibana

Sunday SU-E-T-763

Towards the Mechanical Doping of Plastic Scintillators H. Nusrat*, G. Pang, P. Au, A. Sarfehnia

Sunday SU-E-T-764

Track Repeating Algorithm for Proton Therapy Applied to Intensity Modulated Proton Therapy for Head-And-Neck Patients P. Yepes*, D. Mirkovic, R. Mohan

Sunday SU-E-T-765

Treatment Planning Comparison of SFUD Proton and 4π Radiotherapy for Prostate Cases A. Tran*, J. Zhang, K. Woods, V. Yu, D. Nguyen, K. Sheng

Sunday SU-E-T-766

Treatment Planning Comparison Study On Two Different Multileaf Collimators Delivered with Volumetric Modulated Arc Therapy R. Zhang, F. Xiaomei, W. Bai, X. Zhang, Y. Gao*

Sunday SU-E-T-767

Treatment Planning Study of Prostate Cancer by CyberKnife with Respect to the Urethral Dose H. Mizuno*, H. Mizuno, i. sumida, Y. Otani, m. yagi, m. takashina, O. Suzuki, Y. Yoshioka, m. koizumi, k. ogawa

Sunday SU-E-T-768

Treatment Time Nomogram for Strut-Based Accelerated Partial Breast Applicators A. Yock*, J. Reiff, S. Morcovescu, D. Scanderbeg

Sunday SU-E-T-769

T-Test Based Prior Error Estimate and Stopping Criterion for Monte Carlo Dose Calculation in Proton Therapy X. Hong*, H. Gao, J. Schuemann, H. Paganetti

Sunday SU-E-T-770

Tumor Control in Ion Beam Radiotherapy with Different Ions in Presence of Hypoxia A. Attili*, F. Torriani, G. Russo, F. Dalmasso, S. Giordanengo, F. Bourhaleb, G. Battistoni, A. Kraan, R. Cirio, A. Attili

Sunday SU-E-T-771

Two Dimensional Raman Mapping of Carbon Bonds of Radiochromic Films: An Approach to Micro-Dosimetry T. Heo*, S. Ye

Sunday SU-E-T-772

Uncertainties in Treatment Planning for IROC-Houston Proton Phantom QA Program Due to Variable CT Technique and Proton Energy M. McInnis*, P. Taylor, F. Poenisch, L. Court, M. Guindani, D. Followill

Sunday SU-E-T-773

Use of a Commercial TPS for Deriving Exit Dose Distribution for Patient Specific QA with An EPID P. Haering*, C. Lang, M. Splinter

Sunday SU-E-T-774

Use of a Scintillator-Mirror-Camera System for the Measurement of MLC Leakage Radiation with the CyberKnife M6 System L. Goggin*, W. Kilby, M. Noll, C. Maurer

Sunday SU-E-T-775

Use of Electronic Portal Imaging Device (EPID) for Quality Assurance (QA) of Electron Beams On Varian Truebeam System B. Cai*, S. Yaddanapudi, B. Sun, H. Li, C. Noel, S. Mutic, S. Goddu

Sunday SU-E-T-776

Use of Quality Metrics for a New Hypo-Fractionated Pre-Surgical Mesothelioma Protocol S. Richardson*, V. Mehta

Sunday SU-E-T-777

Use of Tennis Racket and Air Gap Between the Body and Carbon Fiber Couch for Skin Sparing in Radiation Therapy of Prone Breast E. Lief*

Sunday SU-E-T-778

Use of the 2D MatriXX Detector for Measuring Scanned Ion Beam Parameters M. Varasteh Anvar*, S. Giordanengo, M. Donetti, F. Marchetto, M. Ciocca, D. Panizza, V. Monaco, R. Sacchi, A. Vignati, L. Fanola Guarachi, R. Cirio

Sunday SU-E-T-779

Use of the Varian Eclipse Scripting API to Collect Volumetric Modulated Arc Therapy Plan Data L. Janes*, C. Anderson, M. Matuszak, D. Roberts, J. Moran, K. Younge

Sunday SU-E-T-780

Use Robustness Optimization (RO) Method to Improve the Planning Efficiency for Pencil Beam Scanning Cranial Spinal Irradiation X. Ding*, E. Traneus, J. Zhang, H. Lin, H. Zhai, L. Rosen, H. Wu

Sunday SU-E-T-781

Using An Electronic Portal Imaging Device (EPID) for Correlating Linac Photon Beam Energies S. Yaddanapudi*, B. Cai, B. Sun, C. Noel, S. Goddu, S. Mutic

Sunday SU-E-T-782

Using Light Output From Doped Plastic Scintillators to Resolve the Linear Energy Transfer Spectrum of Clinical Electron Beams H. Nusrat*, G. Pang, S. Ahmad, B. Keller, A. Sarfehnia

Sunday SU-E-T-783

Using Matrixx to Determine Transit Dose Contribution Over Clinically Useful Limits of HDR Source Activity M. Bhagwat*, D. O'Farrell, M. Wagar, I. Buzurovic, S. Friesen, A. Damato, P. Devlin, R. Cormack

Sunday SU-E-T-784

Using MLC Log Files for Daily IMRT Delivery Verification S. Stathakis*, D. Defoor, P. Linden, N. Kirby, N. Papanikolaou

Sunday SU-E-T-785

Using Systems Engineering to Design HDR Skin Treatment Operation for Small Lesions to Enhance Patient Safety C. Saw*, M. Baikadi, C. Peters, H. Brereton

Sunday SU-E-T-786

Utility of Gold Wires to Optimize Intensity Modulation Capacity of a Novel Directional Modulated Brachytherapy Tandem Applicator for Image Guided Cervical Cancer Brachytherapy D. Han*, H. Safigholi, A. Soliman, D. Scanderbeg, Z. Liu, W. Song

Sunday SU-E-T-787

Utility of the Two Candidate 192-Ir and 169-Yb HDR Sources for Use with a Novel Direction Modulated Brachytherapy Tandem Applicator for Cervical Cancer Treatment H. Safigholi*, D. Han, A. Soliman, A. Meigooni, W. Song

Sunday SU-E-T-788

Validating the Use of Surfacing Mapping Tools for Motion and Irregular Breathing Pattern Monitoring On Lung SBRT Patients X. Xie*, D. Cao, V. Mehta, D. Shepard

Sunday SU-E-T-789

Validation of 3DVH Accuracy On Quantifying Delivery Errors Based On Clinical Relevant DVH Metrics T. Ma*, L. Kumaraswamy

Sunday SU-E-T-790

Validation of 4D Measurement-Guided Dose Reconstruction (MGDR) with OCTAVIUS 4D System V. Lee*, O. Blanck, R. Leung, M. Wong, G. Law, K. Lee, S. Tung, M. Chan

Sunday SU-E-T-791

Validation of a Determinant Based Photon Transport Solver in Dose Perturbed By Diverse Media H. Kuo*, W. Tome, R. Yaparpalvi, M. Garg, W. Bodner, S. Kalnicki

Sunday SU-E-T-792

Validation of a Secondary TPS for IROC-H Recalculation of Anthropomorphic Phantoms J. Kerns*, R. Howell, D. Followill, A. Melancon, F. Stingo, S. Kry

Sunday SU-E-T-793

Validation of COMPASS 3D Dosimetry as Pre Treatment Verification with Commercial TPS Algorithms S. Vikraman*, D. Manigandan, M. Ramu, K. KP, T. Rajesh, V. Senniandavar, R. Sambasivaselli, S. Maragathaveni, N. Dhivya, M. Muthukumaran, K. Tejinder

Sunday SU-E-T-794

Validation of the MCNPX Monte Carlo Model of the Ocular Beam Line at the Proton Therapy Center Houston U. Titt*, K. Suzuki

Sunday SU-E-T-795

Validations of Dose Calculation Accuracy of Acuros BV in High-Dose-Rate (HDR) Brachytherapy with a Shielded Cylinder Applicator Using Monte Carlo Simulation Y. Li, Z. Tian*, B. Hrycushko, S. Jiang, X. Jia

Sunday SU-E-T-796

Variation of Surface Photon Energy Spectra On Bone Heterogeneity and Beam Obliquity Between Flattened and Unflattened Beam J. Chow*, A. Owrangi, G. Grigorov

Sunday SU-E-T-797

Variations of Cardiac Dose at Different Respiratory Status in CyberKnife M6™ Treatment Plans for Accelerated Partial Breast Irradiation (APBI) S. Long*, C. Shang, G. Evans, T. Leventouri

Sunday SU-E-T-798

Verification of 3DVH Dose Distribution Before Clinical Implementation for Patient-Specific IMRT QA D. McFadden*

Sunday SU-E-T-799

Verification of a Simultaneous Treatment of Multiple Brain Metastases Using VMAT Technique by a Composite Alanine-Gel Dosimeter Phantom J. Pavoni*, W. Neves Junior, M. Silveira, P. Ramos, C. Haddad, O. Baffa Filho

Sunday SU-E-T-800

Verification of Acurose XB Dose Calculation Algorithm at Air Cavity-Tissue Interface Using Film Measurement for Small Fields of 6-MV Flattening Filter-Free Beams S. Kang*, J. Chung, T. Suh

Sunday SU-E-T-801

Verification of Dose Information Passed Through 3D-Printed Products S. Jeong*, D. Kim, W. Chung, M. Yoon, D. Shin, M. Chung

Sunday SU-E-T-802

Verification of Implanted Cardiac Pacemaker Doses in Intensity-Modulated Radiation Therapy: Dose Prediction Accuracy and Reduction Effect of a Lead Sheet J. Lee*, J. Chung

Sunday SU-E-T-803

Verification of QUANTEC Lyman Kutcher Burman (LKB) Model for Grade>=2(2+) Late Rectal Complication Rates Using a Database of 79 Prostate Patients Treated with IMRT M. Fatyga*, S. Schild, S. Vora, M. Schild, W. Wong, X. Liu, J. Li, W. Teresa

Sunday SU-E-T-804

Verification of the BJR-25 Method of KQ Determination for CyberKnife Absolute Dosimetry J. Gersh*, B. Willett

Sunday SU-E-T-805

Verification of the Simplified Monte Carlo Method for Simulation in An Inhomogeneous Phantom S. Mizutani*, Y. Takada, R. Kohno, K. Hotta, T. Akimoto

Sunday SU-E-T-806

Very Fast GPU-Based IMPT Dose Computation A. Sullivan*, M. Brand

Sunday SU-E-T-807

VMAT Vs. DIMRT Vs. SsIMRT Assessing the Dosimetric Parameters of Cervical Carcinoma Treatment with a 20-Patient Sample J. Duan*

Sunday SU-E-T-808

Volumetric Modulated Arc Radiotherapy Vs. Intensity-Modulated Radiotherapy for Early-Stage Nasopharyngeal Carcinoma: A Dosimetric Study J. Lu*, B. Huang, W. Zhang

Sunday SU-E-T-809

Volumetric Modulated Arc Radiotherapy Vs. Intensity-Modulated Radiotherapy for Locally Advanced Laryngeal Carcinoma: A Dosimetric Study J. Lu*, B. Huang, W. Zhang, L. Yan

Sunday SU-E-T-810

Volumetric Modulated Arc Therapy and Conventional Intensity-Modulated Radiotherapy for Non-Small-Cell Lung Cancer with Simultaneously Integrated Boost Radiation Therapy :A Planning Comparison Study T. liu*, J. Chen, g. zhang, t. sun

Sunday SU-E-T-811

Volumetric Modulated Arc Therapy Vs. C-IMRT for the Treatment of Upper Thoracic Esophageal Cancer W. Zhang*, L. Wu, J. Lu, C. Chen

Sunday SU-E-T-812

Volumetric Modulated Arc Therapy-Total Body Irradiation (VMAT-TBI) V.s. Conventional Extended SSD-TBI (cTBI): A Dosimetric Comparisom L. Ouyang*, M. Folkerts, H. Lee, E. Ramirez, R. Timmerman, R. Abdulrahman, S. Jiang, X. Gu

Sunday SU-E-T-813

What Is the "real" Field-Size in Photon Dosimetry? M. Gainey*, M. Kollefrath, R. Saum, G. Bruggmoser

Sunday SU-E-T-814

Whole Breast Irradiation with Two Different Intensity Modulation Radiotherapy Techniques t. sun*, Y. Yin, X. Lin, g. zhang

Sunday SU-E-T-815

In Vivo Dosimetry and Daily Arc Junction Verification Using EBT3 Gafchromic Film for Pediatric Cranio-Spinal Irradiation H. Saleh*, S. Ferjani, V. Masssey, T. Howlin, D. Pokhrel