| Question 1: As CTDI100 excludes contributions from radiation scattered beyond the relative short range of integration along z, it tends to ______ the cumulative dose at the midpoint of a scanning range. |
| Reference: | AAPM Report 111: Comprehensive methodology for the evaluation of radiation dose in x‐ray computed tomography. College Park, MD: American Association of Physicists in Medicine; 2010. |
| Choice A: | approximate |
| Choice B: | underestimate |
| Choice C: | overestimate |
| Question 2: Which of the following protocol parameters does NOT have to be matched when measuring CTDI100? |
| Reference: | American College of Radiology (ACR) 2017 CT QC Manual |
| Choice A: | kVp |
| Choice B: | Rotation time |
| Choice C: | Reconstruction kernel |
| Choice D: | Collimation |
| Question 3: Which of the following is true regarding the helically-acquired CTDIvol estimation method? |
| Reference: | Leon SM, Kobistek RJ, Olguin EA, Zhang Z, Barreto IL Schwarz BC. (2020), The helically‐acquired CTDIvol as an alternative to traditional methodology. J Appl Clin Med Phys, 21: 263-271. |
| Choice A: | The helically-acquired CTDIvol estimates the equilibrium dose |
| Choice B: | The helically-acquired CTDIvol involves entering the helical pitch value in the calculation |
| Choice C: | The helically-acquired CTDIvol method requires entering an advanced service engineer mode |
| Choice D: | The helically-acquired CTDIvol is acquired over a 100-mm scan |
| Question 4: The Joint Commission and the ACR specify a maximum allowable percent difference between the measured and the scanner displayed CTDIvol of: |
| Reference: | American College of Radiology (ACR) 2017 CT QC Manual; Joint Commission Standards and Elements of Performance |
| Choice A: | 5% |
| Choice B: | 10% |
| Choice C: | 20% |
| Choice D: | 50% |
| Question 5: National Diagnostic Reference Levels are: |
| Reference: | Vañó E, Miller DL, Martin CJ, et al. ICRP Publication 135: Diagnostic Reference Levels in Medical Imaging. Ann ICRP 2017;46(1):1–144. |
| Choice A: | national regulatory dose limits for medical imaging examinations |
| Choice B: | the median values of all patient doses collected from a large # of facilities in a country |
| Choice C: | indicators of patient image quality |
| Choice D: | suggested action levels above which a facility should review its methods and determine if acceptable image quality can be achieved at lower doses |
| Question 6: The methodology used by the American College of Radiology to develop adult and pediatric CT Diagnostic Reference Levels for the United States was based on that outlined in: |
| Reference: | Kanal KM, Butler PF, Chatfield MB, et al. U.S. Diagnostic Reference Levels and Achievable Doses for 10 Pediatric CT Examinations, Radiology 2021 (online). |
| Choice A: | FDA 21 CFR 1020, Performance Standards for Ionizing Radiation Emitting Products |
| Choice B: | NRC 10 CFR Part 10, Standards for Protection Against Radiation |
| Choice C: | ICRP Publication 135, Diagnostic Reference Levels in Medical Imaging |
| Choice D: | NCRP Report No 172, Reference Levels and Achievable Doses in Medical and Dental Imaging: Recommendations for the United States |
| Question 7: Which of the following topics will NOT be detailed in the nuclear medicine/PET QC manuals? |
| Reference: | ACR NMAP and PETAP Program Requirements
https://accreditationsupport.acr.org/support/solutions/articles/11000062796-accreditation-testing-overview-nuclear-medicine-and-pet |
| Choice A: | The physician responsibility for oversight of the QC program |
| Choice B: | The technologist required quality control |
| Choice C: | The required periodic physics testing |
| Choice D: | Proper acquisition and submission for accreditation |
| Question 8: There will be three phantoms that can be used for image quality testing in the new manual, the old ACR phantom, the “mini” ACR phantom and the ACR DM QC phantom. What are the minimum pass criteria for the ACR DM QC Phantom in the 2018 DM QC manual? |
| Reference: | 2018 Digital Mammography QC Manual Medical Physicists Section, ACR Digital Mammography (DM) Phantom Image Quality, Performance Criteria and Corrective Actions p. 155 |
| Choice A: | 2 fibers, 2 speck groups, 2 masses |
| Choice B: | 2 fibers, 3 speck groups, 2 masses |
| Choice C: | 3 fibers, 3 speck groups, 3 masses |
| Choice D: | 2 fibers, 2 speck groups, 3 masses |
| Choice E: | 3 fibers, 2 speck groups, 2 masses |
| Question 9: The maximum allowable dose for a single 2D view or DBT view will still be 3 mGy (300 mrad) as outlined in the 1999 QC manual. |
| Reference: | ACR Stereotactic Breast Biopsy Quality Control Manual 1999, Medical Physicists Section, Breast Entrance Exposure, Average Glandular Dose and Exposure Reproducibility, Recommended Performance Criteria and Corrective Action p.80 |
| Choice A: | True |
| Choice B: | False |
| Question 10: Which of the following is NOT accounted for in the establishment of current DRLs? |
| Reference: | Mahesh M. Benchmarking CT Radiation Doses Based on Clinical Indications: Is Subjective Image Quality Enough? Radiology. 2022; 301 (2): 390-391. PMID: 34751622 |
| Choice A: | Volume CT Dose Index (CTDIvol) |
| Choice B: | Image Quality (IQ) |
| Choice C: | Size Specific Dose Estimate (SSDE) |
| Choice D: | Dose Length Product (DLP) |
