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40th Annual Meeting of
the American Association of Physicists in Medicine
August 9-13, 1998 San Antonio, Texas

  Meeting Home
  Session Information

Paper Presentations
Mon-Wed (7 am to 11 pm) Thurs (7 am to 12 pm)
Therapy and General Physics Paper Session
    Room: South Banquet Hall
PA-1 Volume Based Dose Optimization in Brachytherapy - P. Kneschaurek
PA-2 Dosimetry for multiplanar interstitial implants - D. Fontenla*, S. Deore, J. Beitler, B. Vikram
PA-3 Radiation Safety Considerations for Brachytherapy Patients with I-125 and Pd-103 Seed Implants. - D. Macey, I. Brezovich*, P. Pareek
PA-5 Distance-controlled Optimization of Treatment Planning in HDR Brachytherapy for Carcinoma of the Cervix - J. Wang*, Y. Cao*
PA-6 Estimation of the Effects of Patient Motion on the Dose Distribution to Tandem-Ovoid Brachytherapy Patients - M. Blough*, R. Waggener, S. Chafe, F. Valenzuela
PA-7 Clinical Implementation of an Automatic Seed Matching Algorithm for Prostate Implants - B. Arjomandy*, M. Altschuler, E. Yorke, P. Bloch, A. Kassaee
PA-8 Experience with activity verification of I 125 Prostate implant seeds - E. Chen*
PA-9 Comparison of response characteristics of two new reentrant brachytherapy ion chambers. - S. Pai*, L. Reinstein, J. Huang, Z. Xu
PA-10 The importance of Cs-137 source strength verification - R. Yankelevich*, V. Maier, C. Anderko, J. Wojcicka
PA-11 Exposure Rates Around Patients Receiving Endovascular Irradiation of the Coronary Artery in the Beta-CathTM System Trial - D. Mellenberg*, K. Zhen, J. Rossen, E. Pennington, J. Lopez, D. Hussey, D. Mellenberg
PA-12 P-32 Dosimetry Revisit in Intravascular Brachytherapy - N. Yang*, R. Chan
PA-13 Clinical Implementation of Total Skin Electron Therapy using The High Dose Rate Mode of Clinac 2100C - K. Yenice*, A. Sabbas, A. Georgiades, J. Presser, V. Ruiz, L. Nisce, D. Nori
PA-14 TLD In-Vivo Dosimetry for Total Skin Electron Therapy - A. Sabbas*, A. Georgiades, K. Yenice, J. Presser
PA-15 Determination of the peripheral dose in radiotherapy. - P. Van der Giessen*
PA-16 Dosimetry of hip irradiation for the prevention of heterotopic bone formation after arthroplasty - H. Patrocinio*, M. Evans, L. Souhami, M. Tanzer, E. Podgorsak
PA-17 IN-Vivo Measurements Of Doses To Out Of Field Normal Tissues In Radiation Therapy Of Brain Tumors - H. Aghdam*, L. Harisiadis, E. Yorke, K. Wechsler-Jentzsch
PA-18 Dosimetric Study of Large Electron Field - A. Thavendrarajah*, C. Kanellitsas, N. Samsami, N. Gupta
PA-19 Validity of the Equivalent Square Formalism for Field Size Dependence of Wedge Factors - C. James*, C. Chang, K. Gall
PA-20 The Use of Spreadsheets in Clinical TLD Dosimetry - J. Presser*, A. Georgiades, V. Ruiz, A. Sabbas, K. Yenice
PA-21 Energy Spectra Estimation for Linear Accelerator X-Ray Beams Using Large-Field Depth Dose Measurements and a Monte Carlo Calculated TPR Database - G. Luxton*, G. Jozsef, C. Yu
PA-22 A New Method For Measurement Of Phantom Scatter Factor And In Phantom Determination Of Head Scatter Factor For Symmetric And Asymmetric Fields - M. Geso*, G. Lesile
PA-23 Changes in Incident Photon Fluence of 6 and 18 MV x-rays Caused by Blocks and Block Trays - P. Jursinic*
PA-24 A Generalized Method for the Calculation of In-Air Output Factor - S. Kim*, J. Palta
PA-25 Tangential-Field Breast Irradiation: Optimization of Wedge Angle Using a Fast Fluence-Based Pencil Beam Method. - A. Roberge*, P. Dunscombe, E. Lederer
PA-26 Comparison of Monte Carlo First Scatter Kernels with Analytical Klein-Nishina Kernels - J. Zachman*, G. Olivera, T. Mackie
PA-27 A Practical Method for the Calculation of MLC-Shaped Fields Output Factors - K. Yuen, M. Al-Ghazi*, C. Swift, G. White
PA-28 Fast dose computation on any oblique dose grid in 3-D radiation treatment therapy - T. Suh*, H. Lee, B. Choe, S. Yoon, K. Shinn
PA-29 The medium-energy x-ray dosimetry protocol applied to in phantom calibrations of 192Ir brachytherapy sources - N. Reynaert*, F. Verhaegen, H. Thierens
PA-30 The design and Implementation of an Instrument to accurately check Temporal Accuracy of an HDR Remote Afterloader. - J. Presser, A. Sabbas, V. Ruiz*
PA-31 Comparison of a New Commercial Two-Compartment Sievert Integral Model to Monte Carlo - M. Balbes*, N. Dogan, M. Fatyga, J. Williamson
PA-32 How far do seeds move following an interstitial prostate implant? - R. Gatenby*, J. Deasy, D. Wilson, M. Cornett, B. Jose
PA-33 Exposure eliminated by a simple vacuum system constructed to enable Well Chamber assay of single or multiple radioactive seeds from groups of loose seeds prior to seed/needle loading for prostatic seed implantation. - W. Kan*, Z. Ouhib, K. Clark
PA-34 Characterization of Seed Migration in Permanent Prostate Implants and Impact on Post-Implant Dosimetry - R. Taschereau, J. Pouliot, J. Roy, D. Tremblay, R. Taschereau*
PA-35 Computer Simulated Prostate Implants as a Powerful Tool to Predict the Outcome of Any Planning Method - R. Taschereau, J. Pouliot, R. Taschereau*
PA-36 Absorbed Dose Estimates to Normal Organs in Prostate Brachytherapy Patients Treated With Pd-103, I-125 and Ir-192. - D. Macey, I. Brezovich*, P. Pareek, M. Stabin
PA-37 A Correction to the Dosimetry of I-125 Prostate Implants - T. Lowinger*, L. Fridman, T. Mazzilli, S. Huh
PA-38 A Calculation of the Relative Biological Effectiveness of 125I and 103Pd Brachytherapy Sources Using the Concept of Proximity Function - C. Wuu*, M. Zaider
PA-39 Consistency in Treatment Planning and Dose Prescription in HDR Prostate Implants - A. Sharma*, A. Syed, A. Puthawala
PA-40 A Simple Radioisotope Seed Reconstruction For Permanent Implants - S. Li*, N. Detorie, D. Latronico, M. Errens, R. Abrams
PA-41 Treatment Planning Considerations and Quality Assurance for CT Guided Transischiorectal Implantation of the Prostate - J. Williams*, M. Williams
PA-42 The Influence of Timing on the Dosimetric Analysis of Permanent Prostate Brachytherapy - G. Merrick, W. Butler*, A. Dorsey, H. Walbert
PA-43 Dosimetric Effects of Random Variations in Seed Activity and Locations in Prostate Seed Implant Using I-125 and Pd-103 Radioactive Seeds - Z. Chen*, S. Nath, N. Yue, R. Nath
PA-44 A linear accelerator method for producing radioisotopes for prostate implant therapy - K. Weeks*
PA-45 A New Perspective To Assess Mean Lethal Radiation Dose With Organ Weight And Water Proton Spin Lattice Relaxation Time In Human Organs - S. Akber*
PA-46 Visual Models of the Invisible Physical Universe - P. Sprawls*
PA-47 Survival Of Medical Physicist: Work Hours & FTE - S. Brahmavar*, M. LaFrance, A. Al-Ryati
PA-48 Thermal Waves In Cryosurgery - G. Sandison*, J. Rewcastle, L. Hahn, J. Saliken, J. McKinnon, B. Donnelly
PA-50 A Critical Review of HZE-Particle Dosimetry Measurements with Plastic Track Detectors on the Space Shuttle Program - J. Almassy*
PA-51 Seven Years of Neutron Radiation Therapy with the Superconducting Cyclotron at Harper Hospital - R. Maughan*, M. Yudelev, A. Porter, J. Forman, H. Blosser, E. Blosser, G. Blosser
PA-52 Whole- and Partial-Body Radiation Risks from p-boronophenylalanine-mediated Boron Neutron Capture Therapy for Glioblastoma Multiforme - R. Ma*, J. Capala, A. Diaz, D. Greenberg, H. Liu, D. Slatkin, A. Chanana
PA-53 Determining Dose Per Monitor Unit From Total Skin Electron Irradiation Using TLD, Diode, and Parallel-Plate Chamber - H. Liu*, E. Lief, E. McCullough
PA-54 In-house Development of a Radiation Therapy Beam Scanner - P. McGhee*, W. Scherzinger, H. Schwendener, L. Reed
PA-55 Use of an ionization chamber in an anthropomorphic head phantom to verify monitor unit calculational accuracy of a three-dimensional radiation treatment planning system - D. Kaurin*, D. Duggan, K. McGee, C. Coffey
PA-56 Evaluation and Clinical Implementation of a New In-Vivo Dosimetry Diode System - R. Alecu, T. Loomis, J. Alecu, T. Ochran*
PA-57 PC Based Auto QA Program for CT Scanners Used in Radiation Therapy Treatment Planning - J. Levy, S. Dyer, F. Atkins, D. Goodenough*
PA-58 Sparse Sampling of Central-Axis Dose Data for Verification and Calibration of Teletherapy Beams - Y. Xiao*, M. Altschuler, B. Bjarngard
PA-59 Commissioning of Varian Enhanced Dynamic Wedge - J. Erb*, K. Kalbaugh, N. Papanikolaou, K. Sowards, S. Cassola, G. Ibbott
PA-60 Pre-Clinical Evaluation of a Diode-Based In Vivo Dosimetry System - G. Trujillo*, G. Ibbott
PA-61 Experimental Evaluation of the Accuracy of the Asymmetric Collimator Dosimetry Calculation Algorithm Used in a 3D Treatment Planning System - M. Al-Ghazi*, J. McLellan, K. Yuen
PA-62 An Additional QA Tool for Checking the Self-Consistency of the Beam Parameters Documented on a Treatment Plan's Set Up Instructions. - J. Ashburn*
PA-63 A study of wavelet-based denoising and edge detection in the automatic delineation of anatomic structures on CT images - S. Ahmad*, G. Starkschall, K. Berkner, R. Wells,Jr., J. Lewis, J. Odegard, C. Burrus
PA-65 Characteristics Of The CEA Imaging System For Megavoltage Portal Imaging - C. Cheng*, I. Das, H. Roehrig
PA-66 The importance of CT slice thickness in radiographic patient positioning accuracy - M. Murphy*
PA-67 Application of Digital Computed Radiography in the Radiation Oncology Department. - B. Rajagopalan*
PA-68 Automatic Patient and Linear Accelerator Setup Verification using an EPID - D. Roback*, B. Gerbi
PA-69 Viability of an isocentric cobalt-60 teletherapy unit for stereotactic radiosurgery - B. Poffenbarger*, E. Podgorsak
PA-70 Dosimetric characterization of a mini-MLC for stereotactic radiosurgery application - M. Lundsten*, J. Jackson, K. Javedan, A. Niroomand-Rad, J. Rodgers
PA-71 Dosimetric characterization of a mini-MLC for multiple field conformal radiotherapy - J. Jackson, K. Javedan, M. Lundsten, A. Niroomand-Rad, J. Rodgers*
PA-72 Planning of fixed field Stereotactic Radiotherapy using a Stereotactic Localising Program and a regular Treatment Planning System - T. Ackerly*, M. Geso, J. Cramb
PA-73 Early Experience with Use of Hybrid Commerical Systems for Stereotactic Radiotherapy - S. Goetsch*, J. Steigerwalt
PA-74 Dose - Volume Study for Multiple Brain Metastases Treatment Using Gamma Knife - Z. Chen*, X. Wu, C. Luo
PA-75 Smoother Radiosurgery Beam Profiles with Radiochromic Film by Averaging Over Several Films - D. Duggan*, C. Coffey, II
PA-76 Use of a Miniature Ionization Chamber for the Measurement of Small Stereotactic Photon Fields - S. Goetsch*, M. Bank, L. De Werd, B. Murphy, J. Micka
PA-77 Superposition of Beams to Vary Shot Size in Gamma Knife Stereotactic Radiosurgery - M. Bank*
PA-78 Dosimetric Aspects Of Small Circular 4 And 6 MV Photon Beams For Radiosurgery - W. Al-Najjar*, S. Prasad, K. Parthasaradhi, M. LaCombe, W. Bloomer
PA-79 Water Equivalency Of Polystyrene For 4, 6, And 10 MV Photon Radiosurgery Beams - W. Al-Najjar*, S. Prasad, K. Parthasaradhi, W. Bloomer
PA-80 Gamma Knife Beam Profiles Measured with Film and PTW Pinpoint Chamber - M. Bank*
PA-81 Dosimetric evaluation of stereotactic radiotherapy delivered using coventional MLC versus Tertiary collimator - N. Ikoro*, M. Cosma, S. Saraf, J. Factor, B. Mohktar
PA-82 Linac based stereotactic radiosurgery for treatment of trigeminal neuralgia - B. Gerbi*, P. Higgins, K. Cho, W. Hall, R. Maxwell
PA-83 A Leaf-Setting Algorithm with Minimum Machine Units and Beam Delivery Time For Intensity Modulated Radiotherapy - L. Ma*, A. Boyer, L. Xing, C. Ma
PA-84 Leaf Synchronization Methods of Minimizing Beam Delivery Time and Improving Beam Output for Intensity Modulated Fields - L. Ma, A. Boyer*, L. Xing, C. Ma
PA-85 The Effect of Internal Organ Motion on Dosimetry of Conformal Prostate Treatment Plans With Position Correction - R. Lalonde*, J. Bycura, R. Campbell, R. Riker, J. Strait, M. Carol, R. Lalonde
PA-86 Tomotherapy: Conformal Avoidance Radiation Therapy -- A Complement to Conformal Radiotherapy - J. Aldridge*, D. Shepard, T. Mackie, P. Reckwerdt
PA-87 Dose Across the Match Plane of Breast Fields Considering Mechanical Tolerance of Collimator Jaw alignment and Setup Uncertainties - J. Palta*, C. Liu, Z. Li, N. Mendenhall
PA-88 Commissioning a Siemens Virtual Wedge - M. Bank*, C. DesRosiers, L. Papiez
PA-89 Acceptance Testing and Measurements On Intensity Modulated Radiation Therapy(IMRT) Device - M. Nair*, A. Gray, K. Boydston
PA-90 Reduction of MIMIC Elementary Beam Dimension and the Impact on Treatment Plan Conformality - B. Salter*, A. Kania, B. Curran
PA-91 Validation software for Peacock Intensity Modulated Treatment Plans Using Phantom Plan - W. Grant*, J. McGary
PA-92 CT Based Conformal Planning of Craniospinal Radiotherapy - A. Agranovich, M. Al-Ghazi, C. Swift*, W. Kwan
PA-93 A 3-D Treatment Planning Comparison of Two Lung Blocking Techniques used in Breast Conservative Treatment - D. Chase*, C. Ramsey, A. Oliver
PA-94 Extension of an Inverse Planning System from Algorithm Development to Clinical Implementation - B. Tollenaar*, F. Newman, S. McCourt, S. Humphries
PA-95 On the Isotropic Distribution of Beam Directions - L. Papiez*, M. Langer, X. Lu
PA-96 A comparison of field shape optimized conventional and intensity modulated prostate plans - M. Muthuswamy*, K. Forster
PA-97 Application of Constrained Optimization to Radiotherapy Planning - O. Sauer*, D. Shepard, T. Mackie
PA-98 The Maximum Likelihood Approach to Radiotherapy Optimization: Strengths, Weaknesses, Stability, and Penalties - D. Shepard*, G. Olivera, P. Reckwerdt, T. Mackie
PA-99 Optimization of beam weight, wedge angle and beam direction - J. Yang*, C. Chui
PA-100 The Optimal Step-Length in Iterative Methods for Inverse Treatment Planning - R. Li*, F. Yin, Q. Gao
PA-101 A Comparative Analysis Of Four Field And Cross Fire Conformal 3-D Techniques For Prostate Treatment Under Simulated Prostate Motion & Setup Errors - J. Feldmeier, J. Battle, R. Dobelbower, R. Price*, S. Jiang, K. Ayyangar, R. Price
PA-102 A Comprehensive Dosimetric Evaluation of MLC Field Blocking: A Clinical Guide to MLC Usage - J. Killoran*, J. Giraud, L. Chin, G. Svensson
PA-103 A study of algorithm dimensionality in the calculation of dose for photon beams - N. Papanikolaou*, M. Gehring
PA-104 Dosimetric Undulation in Multileaf Collimator Fields - I. Das*, T. Steinberg
PA-105 Modifications and Strategies for Treating Large Areas of the Scalp - J. Ashburn*
PA-106 3D Conformal Therapy Planning for Multiple Lung Tumors - L. Olson, E. Greenleaf, M. Chan*
PA-107 The Effect of Using Large Collimator Rotations in Isocentric Tangential Breast Treatments - S. Hong*, Y. Lo