| Question 1: True or false: Patient immobilization equipment's sole purpose is to reproducibly position the patient for each treatment fraction. |
| Reference: | Dieterich, Sonja, et al. Practical radiation oncology physics: A companion to Gunderson & Tepper's Clinical radiation oncology. Elsevier Health Sciences, 2015. P. 87. |
| Choice A: | True |
| Choice B: | False |
| Question 2: The following are commonly used for patient immobilization: |
| Reference: | Dieterich, Sonja, et al. Practical radiation oncology physics: A companion to Gunderson & Tepper's Clinical radiation oncology. Elsevier Health Sciences, 2015. P. 88-91. |
| Choice A: | Thermoplastic masks |
| Choice B: | Expandable polyurethane foam |
| Choice C: | Vacuum cushions |
| Choice D: | Wingboards |
| Choice E: | All of the above |
| Question 3: Prone positioning on a "belly board" for abdominal treatments has what benefit: |
| Reference: | Dieterich, Sonja, et al. Practical radiation oncology physics: A companion to Gunderson & Tepper's Clinical radiation oncology. Elsevier Health Sciences, 2015. P. 87. |
| Choice A: | Displaces bowel out of the treatment field |
| Choice B: | Increases reproducibility compared to supine positioning |
| Choice C: | Increases clearance at the treatment machine |
| Question 4: Patient immobilization equipment can contribute to which of the following dosimetric effects: |
| Reference: | Olch, Arthur J., et al. "Dosimetric effects caused by couch tops and immobilization devices: report of AAPM Task Group 176." Medical physics 41.6Part1 (2014). |
| Choice A: | Increased skin dose |
| Choice B: | Increased attenuation of the beam within the device |
| Choice C: | Neither of the above |
| Choice D: | Both increased skin dose and attenuation of the beam |
| Question 5: The surface dose from a 6 MV beam has been found to increase from approximately 16% to approximately ____ percentage when using vacuum or foam immobilization devices: |
| Reference: | Olch, Arthur J., et al. "Dosimetric effects caused by couch tops and immobilization devices: report of AAPM Task Group 176." Medical physics 41.6Part1 (2014). |
| Choice A: | 20% |
| Choice B: | 30% |
| Choice C: | 50% |
| Choice D: | 70% |
| Question 6: Frameless thermoplastic masks have been found to have intra-fractional motion on the order of: |
| Reference: | Tryggestad, Erik, et al. "Inter-and intrafraction patient positioning uncertainties for intracranial radiotherapy: a study of four frameless, thermoplastic mask-based immobilization strategies using daily cone-beam CT." International Journal of Radiation Oncology* Biology* Physics 80.1 (2011): 281-290. |
| Choice A: | Greater than 2 mm |
| Choice B: | Around 1 mm |
