2021 AAPM Virtual 63rd Annual Meeting
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Session Title: Current Status of Proton Thoracic Radiotherapy
Question 1: The difference between 4D dose and dynamic 4D dose is:
Reference:AAPM Task Group 290 report
Choice A:4D dose includes delivery timing information but dynamic 4D dose does not
Choice B:Dynamic 4D dose includes delivery timing information but 4D dose does not
Choice C:4D dose is based on 4DCT and dynamic 4D dose is not
Choice D:Dynamic 4D dose is based on 4DCT and 4D dose is not
Choice E:There is no difference
Question 2: 4DCT is NOT typically used for:
Reference:AAPM Task Group 290 report
Choice A:Motion assessment
Choice B:Tumor contouring
Choice C:Treatment Planning
Choice D:Treatment Delivery
Question 3: Which of the following techniques is not routinely used for patient motion monitoring during treatment delivery:
Reference:AAPM Task Group 290 report
Choice A:Fluoroscopy X-ray
Choice B:Optical surface imaging
Choice C:Ultrasound imaging
Choice D:None of above
Question 4: Large proton pencil beam scanning spots can be employed to:
Reference:Proton pencil beam scanning for mediastinal lymphoma: the impact of interplay between target motion and beam scanning: C Zeng, J, P Plastaras, Z A Tochner, B M White, C E Hill-Kayser, S M Hahn and S Both Phys. Med. Biol. 60 (2015) 3013–3029
Choice A:Mitigate the interplay effect
Choice B:Improve target dose conformity
Choice C:Decrease target dose robustness
Choice D:Decrease dose to organs at risk
Question 5: The respiratory correlated 4DCT can be used:
Reference:Evaluation of interplay and organ motion effects by means of 4D dose reconstruction and accumulation: Arturs Meijers Antje-Christin Knopf Anne P.G. Crijns Jan F. Ubbels Anne G.H. Niezink Johannes A. Langendijk Robin Wijsman, Stefan Both; Radiotherapy and Oncology 150 (2020) 268–274
Choice A:Online for target dose reconstruction and accumulation
Choice B:Offline for target dose reconstruction and accumulation
Choice C:Offline for intrinsic cardiac motion evaluation
Choice D:Online for organs at risk dose reconstruction and accumulation
Question 6: The largest contributor to target dose degradation for 3D robustly optimized thorax IMPT treatments is the:
Reference:Evaluation of interplay and organ motion effects by means of 4D dose reconstruction and accumulation: Arturs Meijers Antje-Christin Knopf Anne P.G. Crijns Jan F. Ubbels Anne G.H. Niezink Johannes A. Langendijk Robin Wijsman, Stefan Both; Radiotherapy and Oncology 150 (2020) 268–274
Choice A:Interplay effect
Choice B:Anatomical changes
Choice C:Large number of treatment fractions
Choice D:Inaccuracies in HUs
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