| Question 1: What is SSIM? |
| Reference: | Wang, Z.; Bovik, A. C.; Sheikh, H. R.; Simoncelli, E. P. "Image quality assessment: from error visibility to structural similarity," IEEE Transactions on Image Processing, vol. 13, issue 4, pp. 600-612. |
| Choice A: | Structural similarity |
| Choice B: | A parameter to measure the image intensity difference |
| Choice C: | A parameter to measure the image similarity |
| Choice D: | A parameter to measure image contrast |
| Choice E: | Combination of above |
| Question 2: What is MPC? |
| Reference: | Machine Performance Check, Varian Medical Systems |
| Choice A: | Machine performance check |
| Choice B: | A script to check the machine quality |
| Choice C: | Only Varian machine can do MPC |
| Choice D: | All machines have the potentials to do MPC |
| Choice E: | All of above |
| Question 3: What are the linac parameters that influence the MPC Uniformity test? |
| Reference: | Barnes M, Greer P. Evaluation of the TrueBeam machine performance check (MPC) beam constancy checks for flattened and flattening filter-free (FFF) photon beams. J. Appl. Clin. Med. Phys. 2017; 18: 139-150. |
| Choice A: | Beam output, Beam quality, Beam steering |
| Choice B: | Beam steering, Beam quality, EPID dose response |
| Choice C: | Beam steering, Beam quality, EPID relative pixel-to-pixel response |
| Choice D: | Beam output, Beam steering, EPID relative pixel-to-pixel response |
| Choice E: | Beam steering, Beam Quality, EPID dose response |
| Question 4: The MPC Beam Uniformity check: |
| Reference: | Barnes M, Greer P. Evaluation of the TrueBeam machine performance check (MPC) beam constancy checks for flattened and flattening filter-free (FFF) photon beams. J. Appl. Clin. Med. Phys. 2017; 18: 139-150. |
| Choice A: | Utilises raw (non-flood field corrected) EPID images |
| Choice B: | Ratios the QA image with the baseline image and then smooths the ratio image. |
| Choice C: | Result is the variation between the two pixels with the highest and lowest values. |
| Choice D: | Does not present results in both planes. |
| Choice E: | All of the above. |
| Question 5: The EPID can be used to check the following QA tests: |
| Reference: | Sun, Baozhou, S. Murty Goddu, Sridhar Yaddanapudi, Camille Noel, Hua Li, Bin Cai, James Kavanaugh, and Sasa Mutic. "Daily QA of linear accelerators using only EPID and OBI." Medical physics 42, no. 10 (2015): 5584-5594. |
| Choice A: | Dosimetry output constancy |
| Choice B: | Beam flatness and symmetry |
| Choice C: | Winston Luts test |
| Choice D: | MLC positioning accuracy |
| Choice E: | All of above |
| Question 6: What are the advantages of using EPID for machine QA: |
| Reference: | Winkler, Peter, Alfred Hefner, and Dietmar Georg. "Dose-response characteristics of an amorphous silicon EPID." Medical physics 32.10 (2005): 3095-3105 |
| Choice A: | High Resolution |
| Choice B: | Digital output for automation |
| Choice C: | No dose rate dependence |
| Choice D: | Linear dose response |
| Choice E: | All of the above |
| Choice F: | A, B, D |
