Question 1: The greatest source of uncertainty in the radiotherapy of lung tumors arises from:
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Reference: | Senan et al., Defining target volumes for non-small cell lung carcinoma, Seminars in Radiation Oncology, 14(4):308-314, 2004. |
Choice A: | Patient motion. |
Choice B: | Patient setup. |
Choice C: | Tumor delineation. |
Choice D: | Tumor motion. |
Choice E: | Tumor tracking. |
Question 2: The magnitude of respiratory motion below which active respiratory motion management during radiotherapy may prove to be ineffective is:
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Reference: | Ref: Keall et al., The management of respiratory motion in radiation oncology report of AAPM Task Group 76, Med Phys 33(10): 3874-900 |
Choice A: | 1 cm |
Choice B: | 3 cm |
Choice C: | 0.3 cm |
Choice D: | 2 cm |
Choice E: | 0.5 cm |
Question 3: Which if these methods can be used to determine ITV?
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Reference: | Keall et al., The management of respiratory motion in radiation oncology report of AAPM Task Group 76, Med Phys 33(10): 3874-900 |
Choice A: | “Slow” CT. |
Choice B: | Breath hold CT. |
Choice C: | Respiration triggered CT. |
Choice D: | 4D/Respiration correlated CT. |
Choice E: | Volumetric CT. |
Choice F: | All of the above. |
Question 4: What is Lung SBRT?
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Reference: | AAPM TG101 |
Choice A: | A single fraction treatment. |
Choice B: | A treatment with “n” fractions (n is your choice). |
Choice C: | Any treatment on a machine claiming “stereotactic” capability. |
Choice D: | Any treatment that uses a stereotactic frame. |
Question 5: Maximum intensity projections (MIP) may be problematic in all of the following ways, except:
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Reference: | Comparison of helical, maximum intensity projection (MIP), and averaged intensity (AI) 4D CT imaging for stereotactic body radiation therapy (SBRT) planning in lung cancer, Jeffrey D. Bradley, , Ahmed N. Nofal, Issam M. El Naqa,Wei Lu,Jubei Liu, James Hubenschmidt,Daniel A. Low,Robert E. Drzymala, Divya Khullar, Radiotherapy and Oncology, 81(3): 264-268, Dec 2006
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Choice A: | Where background and tumor have similar Hounsfield units. |
Choice B: | When MIP used for planning, the isodose coverage may be overestimated. |
Choice C: | MIPs may underestimate normal tissue volumes (i.e. lung). |
Choice D: | MIPs are most helpful near the diaphragm. |
Question 6: What statement is correct when performing pre-Tx patient specific QA?
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Reference: | Comparison of helical, maximum intensity projection (MIP), and averaged intensity (AI) 4D CT imaging for stereotactic body radiation therapy (SBRT) planning in lung cancer, Jeffrey D. Bradley, , Ahmed N. Nofal, Issam M. El Naqa,Wei Lu,Jubei Liu, James Hubenschmidt,Daniel A. Low,Robert E. Drzymala, Divya Khullar, Radiotherapy and Oncology, 81(3): 264-268, Dec 2006 |
Choice A: | The very plan that is prepared for patient delivery at record and verify should be used for QA. |
Choice B: | All gantry angles, couch angles should be used in QA. |
Choice C: | Absolute dose should be measured. |
Choice D: | Verify a distribution of points planar/3D. |
Choice E: | All of the above. |