2016 AAPM Annual Meeting
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Session Title: SBRT Workflow Overview
Question 1: Which of the following statements will degrade the SBRT treatment accuracy/precision?
Reference:Salama J, Kirkpatrick J, Yin F-F. “Stereotactic body radiotherapy treatment of extracranial metastases.” Nature Reviews Clinical Oncology Nov 9(11):654-665 (2012).
Choice A:SBRT requires highly conformal dose distribution.
Choice B:SBRT requires assessment and management of organ motion.
Choice C:SBRT does not need immobilization.
Choice D:SBRT typically has less than 5 treatment fractions with high dose per fraction.
Choice E:SBRT requires image-guidance for target localization
Question 2: Which of following statements is not true for SBRT?
Reference:Ge H, Cai J, Kelsey C, Yin, F-F. “Quantification and Minimization of Uncertainties of Internal Target Volume (ITV) for Stereotactic-body Radiation Therapy (SBRT) of Lung Cancer.” Int J Radiat Oncol Biology Phys 2013 Feb 1;85(2):438-43 (2012 June Epub ahead of print).
Choice A:SBRT treatment can be delivered using multiple 3D conformal beams.
Choice B:SBRT treatment can be delivered using either IMRT or VMAT.
Choice C:SBRT treatment can be delivered using multiple dynamic conformal arcs.
Choice D:4D CTs always give the true target motion.
Choice E:4D CTs are always used to estimate the true target motion.
Question 3: According to RTOG protocols, in a lung SBRT planning V20 for lung (percent of lung receiving a dose of 20Gy or above) should be less than:
Reference:RTOG protocols 0236, 0618,0813 and 0915
Choice A:5%.
Choice B:10%.
Choice C:15%.
Choice D:20%.
Choice E:30%.
Question 4: Which of the following answer is the best representation of a 3D intra-fraction target variation in lung SBRT treatment?
Reference:C. Shah, L. L. Kestin, A. J. Hope, J. P. Bissonnette, M. Guckenberger, Y. Xiao, J. J. Sonke, J. Belderbos, D. Yan, I. S. Grills, “Required target margins for image-guided lung SBRT: Assessment of target position intrafraction and correction residuals”, Practical Radiation Oncology, 3(1) 67-73, 2013
Choice A:<1mm.
Choice B:~2mm.
Choice C:~3mm.
Choice D:~4mm.
Choice E:>5mm
Question 5: ASTRO and ACR SBRT guidelines recommend that the accuracy of image guidance and treatment delivery systems be evaluated
Reference:Potters L, et al. “American Society for Therapeutic Radiology and Oncology (ASTRO) and American College of Radiology (ACR) practice guideline for the performance of stereotactic body radiation therapy.” Int J Radiat Oncol Biol Phys. 2010; 76:326–332.
Choice A:When Convenient.
Choice B:Separately.
Choice C:Together.
Choice D:By a Radiation Oncologist.
Question 6: AAPM Task Group Report101 recommends that a qualified physicist....
Reference:Benedict S, et al. “Stereotactic body radiation therapy: The report of AAPM Task Group 101.” Med Phys. 2010; 37:4078–4101.
Choice A:Be present from beginning to end of the first SBRT fraction.
Choice B:Be available for subsequent fractions.
Choice C:Approve the image registration.
Choice D:A and B.
Choice E:All of the above.
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