| Question 1: Which of the following accreditation requires CT QC/QA? |
| Reference: | ACR 2017 Computed Tomography Quality Control Manual; The 2018 IAC Standards and Guidelines for CT Accreditation. |
| Choice A: | The Joint Commission Accreditation |
| Choice B: | ACR CT Accreditation |
| Choice C: | IAC CT Accreditation |
| Choice D: | All of the above |
| Question 2: Which of the following is included in performance evaluation of a CT system? |
| Reference: | AAPM TG-233 Report, “Performance Evaluation of Computed Tomography Systems”, 2019. |
| Choice A: | Image uniformity |
| Choice B: | Low contrast detectability |
| Choice C: | Geometric accuracy |
| Choice D: | High contrast spatial resolution |
| Choice E: | All of the above |
| Question 3: Slice Sensitivity Profile (SSP) evaluation is dependent on the region of interest (ROI) value used. It is recommended to use the ROI maximum pixel value in generating the SSP full width at half maximum measurement. |
| Reference: | Travis Greene, X John Rong; Evaluation of techniques for slice sensitivity profile measurement and analysis, Journal of Applied Medical Physics, Vol. 15, No. 2, 2014, pg 281-293. |
| Choice A: | True |
| Choice B: | False |
| Question 4: A CBCT equipment performance evaluation may include which of the following? |
| Reference: | AAPM TG142 report, “Quality Assurance of Medical Accelerators”, 2009 |
| Choice A: | Geometric distortion |
| Choice B: | HU constancy |
| Choice C: | Spatial resolution |
| Choice D: | Uniformity |
| Choice E: | All of the above |
| Question 5: What would be a potential impact of using 12-bit CT image reconstruction? |
| Reference: | C. Glide‐Hurst D. Chen H. Zhong I. J. Chetty, Changes realized from extended bit‐depth and metal artifact reduction in CT, Medical Physics, Vol40, May 2013 |
| Choice A: | Reduction of low contrast detectability |
| Choice B: | High-HU values may artificially saturate |
| Choice C: | A shift in the HU value of water |
| Choice D: | Increased image noise |
| Question 6: According to AAPM TG-66, how often should CT numbers of different materials be checked? |
| Reference: | AAPM TG66 Report: Quality assurance for computed-tomography simulators and the computed tomography-simulation process: Report of the AAPM Radiation Therapy, 2003 |
| Choice A: | Weekly |
| Choice B: | Daily |
| Choice C: | Monthly (at least 4-5 materials), plus Annually (Electron Density Phantom) |
| Choice D: | Variable, per requirements of Treatment Planning System vendor |
| Question 7: Which of the following is a character of image spatial resolution? |
| Reference: | Jerrold Bushberg, J. Anthony, John Boone, et al, “The Essential Physics of Medical Imaging”, pg. 72, LWW, 2012. |
| Choice A: | Contrast and CNR |
| Choice B: | X-ray field uniformity |
| Choice C: | Modulation transfer function |
| Choice D: | X-ray field and light field |
| Question 8: Based on AAPM TG-270 guidance for diagnostic displays, what is the maximum allowed error rate for GSDF gamma conformance? |
| Reference: | AAPM TG-270 Report, “Display Quality Assurance”, 2019. |
| Choice A: | 5% |
| Choice B: | 10% |
| Choice C: | 15% |
| Choice D: | 20% |
| Question 9: For diagnostic display monitors, what tests are recommended in AAPM TG-270 quarterly tests? |
| Reference: | AAPM TG-270 Report, “Display Quality Assurance”, 2019. |
| Choice A: | Qualitative luminance response |
| Choice B: | Qualitative ambient luminance / illuminance |
| Choice C: | Qualitative Uniformity |
| Choice D: | Qualitative Spatial Resolution |
| Choice E: | All of the above |
| Question 10: Which factor has the greatest impact on the deterioration of the monitor quality? |
| Reference: | Yu Liu, Jihong Wang, “PACS and Digital Medicine: Essential Principles and Modern Practice in Digital Medicine”, CRC Press, pg.50, 2010. |
| Choice A: | LCD material |
| Choice B: | Backlight |
| Choice C: | Power unit |
| Choice D: | Surface of screen |
