Question 1: Which procedure has lowest dose?
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Reference: | Ding and Munro, "Radiation exposure to patients from image guidance procedures and techniques to reduce the imaging dose," Radiother Oncol, vol. 108, pp. 91-8, Jul 2013 |
Choice A: | MV portal imaging. |
Choice B: | MVCT. |
Choice C: | kV radiograph. |
Choice D: | kV-CBCT. |
Choice E: | MV-CBCT. |
Question 2: Radiation Dose-to-bone vs dose-to-soft tissue: which is true?
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Reference: | Ding and Coffey, "Radiation dose from kilovoltage cone beam computed tomography in an image-guided radiotherapy procedure," Int J Radiat Oncol Biol Phys, vol. 73, pp. 610-7, 2009.
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Choice A: | D bone > D soft tissue for MV. |
Choice B: | D bone > D soft tissue for kV. |
Choice C: | D bone ~ 1.5 times of D soft tissue for MV. |
Choice D: | D bone ~ 2-4 times of D soft tissue for kV. |
Choice E: | Both 1 & 2. |
Question 3: Imaging dose from kilovoltage CBCT in radiation therapy can be determined accurately by:
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Reference: | Ding et al. “Accurate patient dosimetry of kilovoltage cone-beam CT in radiation therapy," Med Phys 35, 1135-1144 (2008)
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Choice A: | Monte Carlo Techniques. |
Choice B: | Commercial model-based treatment planning systems. |
Choice C: | Dose-Area Product meters. |
Choice D: | Referring to manufacturer manuals. |
Question 4: What is a typical MV-CBCT dose to isocenter for a pelvic cancer patient?
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Reference: | Miften et al, Med Phys 34, 3760-3767 (2007)
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Choice A: | 0.01 cGy |
Choice B: | 0.1 cGy |
Choice C: | 1 cGy |
Choice D: | 10 cGy |
Question 5: Accounting of kilovoltage imaging dose in treatment planning:
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Reference: | Alaei and Spezi, “Imaging dose from cone beam computed tomography in radiation therapy”, Phys. Medica 31, 647-658 (2015) |
Choice A: | Is only possible in one treatment planning system. |
Choice B: | Is necessary for all imaging techniques and protocols. |
Choice C: | May be warranted if a high dose imaging protocol is employed. |
Choice D: | None of the above. |
Question 6: What is the expected MVCT (TomoTherapy) dose range? |
Reference: | Meeks et al, Med Phys 32, 2673-81 (2005) |
Choice A: | 0.03 – 0.1 cGy |
Choice B: | 0.3 – 1 cGy |
Choice C: | 3 – 10 cGy |