2018 AAPM Annual Meeting
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Session Title: Imaging in Proton Therapy
Question 1: What is the name of the process in which HU values for inorganic samples are used to parameterize a CT scanner, and that parameterization is used to develop a calibration of HU to relative stopping power for theoretical tissues?
Reference:Source: “The calibration of CT Hounsfield units for radiotherapy treatment planning” by Schneider, PMB 41(1) 1996
Choice A:Indirect Calibration.
Choice B:Stoichiometric Calibration.
Choice C:Robust Calibration.
Choice D:Rayleigh Calibration.
Question 2: Which of the following physical properties of a material is used in the Bethe-Bloch equation for calculating stopping power?
Reference:“The calibration of CT Hounsfield units for radiotherapy treatment planning” by Schneider, PMB 41(1) 1996
Choice A:Ionization potential.
Choice B:Inductance.
Choice C:Permittivity.
Choice D:Atomic number.
Question 3: What are the methods for correcting CBCT Image Quality?
Reference:Kurz, C. , Kamp, F. , Park, Y. , et al (2016), Investigating deformable image registration and scatter correction for CBCT‐based dose calculation in adaptive IMPT. Med. Phys., 43: 5635-5646. doi:10.1118/1.4962933
Choice A:A priori Model based.
Choice B:HLUT.
Choice C:Deformed CT.
Choice D:All of the above.
Question 4: The most common imaging technique used for positioning patients undergoing proton therapy is:
Reference:MacKay R.I., (2018) Image Guidance for Proton Therapy, Clinical Oncology, Volume 30, Issue 5, 293-298, ISSN 0936-6555, https://doi.org/10.1016/j.clon.2018.02.004.
Choice A:CT in the room.
Choice B:Surface Imaging.
Choice C:2D X-Ray imaging.
Choice D:CBCT.
Question 5: Uncertainties in the exact location of the distal range of the proton beam arise from:
Reference:Paganetti, H, Range uncertainties in proton therapy and the role of Monte Carlo simulations, Phys. Med. Biol. 57 (2012) R99-R117.
Choice A:Patient setup.
Choice B:Inhomogeneity of patient tissues.
Choice C:CT calibration techniques.
Choice D:Beam commissioning uncertainties.
Choice E:All of the above.
Question 6: Which is not a method of in vivo range verification for proton therapy:
Reference:Knopf and Lomax, In vivo proton range verification: a review, Phys, Med. Biol. 58 (2013) R131-R160.
Choice A:Proton Radiography.
Choice B:Prompt gamma imaging.
Choice C:Post treatment MRI.
Choice D:Optical tomography.
Choice E:Online PET imaging.
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