Question 1: For isocentric fluoroscopic systems, the interventional reference point is located along the central x-ray beam at a distance of.....
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Reference: | : Stecker M. et al, Guidelines for Patient Radiation Dose Management, J Vasc Interv Radiol 2009; 20:S263–S273
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Choice A: | 30 cm from the x-ray detector. |
Choice B: | 15 cm from the x-ray detector. |
Choice C: | 15 cm from the isocenter in the direction of the focal spot |
Choice D: | 30 cm from the isocenter in the direction of the focal spot |
Question 2: The patient follow-up dose threshold recommended by SIR is:
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Reference: | Stecker M. et al, Guidelines for Patient Radiation Dose Management, J Vasc Interv Radiol 2009; 20:S263–S273
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Choice A: | 2000 mGy Peak Skin Dose. |
Choice B: | 5000 mGy Air kerma at the reference point. |
Choice C: | 90 minutes of fluoroscopy time. |
Choice D: | 600 Gy cm2 Kerma-area-product. |
Question 3: Patient dose history should affect justification of future exams utilizing ionizing radiation in the following ways if LNT hypothesis is accepted:
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Reference: | Walsh C, Murphy D. Should the justification of medical exposures take account of radiation risks from previous examinations? BJR. 2014;87:20130682 |
Choice A: | Not at all. Two radiation events are independent and hypothetical past risks should not be weighted in the justification of future exams. |
Choice B: | Strongly. Increasing the total number of exams adds to the patients cumulative exposure and increases Lifetime Attributable Risk (LAR) |
Choice C: | Moderately. Although cumulative exposure increases with more exams, the diagnostic benefit typically outweighs these hypothetical risks. |
Choice D: | On a patient-by-patient basis depending on underlying pathology. |
Question 4: Diagnostic Reference Ranges should be established based on
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Reference: | Goske MJ, Strauss KJ, Coombs LP, et al. Diagnostic Reference Ranges for Pediatric Abdominal CT. Radiology. 2013. |
Choice A: | National survey data from many different institution categories (adult, pediatric, academic. |
Choice B: | National survey data from relevant practice type (e.g. pediatric). |
Choice C: | 25th and 75th percentile values of the ACR Dose Index Registry. |
Choice D: | Achievable levels within host institution in consideration of technology, patient demographics and clinical indication. |
Question 5: What information is needed and commonly available from the Radiation Dose Structured Report (RDSR) for reviewing CT dose distributions for a protocol?
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Reference: | The DICOM Standard 2016a, http://dicom.nema.org/standard.html |
Choice A: | Tube Starting Angle. |
Choice B: | Irradiation Event UID. |
Choice C: | CTDIw Phantom Type, DLP, and CTDIvol. |
Choice D: | Top Z Location of Scanning Length. |
Question 6: Which system is used by the ACR Dose Index Registry to standardize imaging procedure names?
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Reference: | The ACR DIR website, http://www.acr.org/Quality-Safety/National-Radiology-Data-Registry/Dose-Index-Registry/Data-Transmission-and-Compatible-Vendors |
Choice A: | Individual institutions own set of examination types |
Choice B: | SNOMED |
Choice C: | DICOM Standard CT Procedure Names |
Choice D: | RadLex Playbook and ACR Common |