2020 Joint AAPM | COMP Virtual Meeting
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Session Title: NCRP 184 - Radiation Exposure to Patients in the United States
Question 1: According to NCRP report #184, what is the probable cause for decrease in CT dose per capita compared to NCRP 160?
Reference:1. National Council on Radiation Protection and Measurements. Medical Radiation Exposure of Patients in the United States, NCRP Report 184, Bethesda, Md: National Council on Radiation Protection and Measurements, 2019. 2. Mettler, FA, Mahesh M, Frush DP et al., Patient exposure from radiologic and nuclear medicine procedures in the United States: procedure volume and effective dose for the period 2006-2016. Radiology 2020; 295: 418-427. PMID: 32181730.
Choice A:Decrease in effective dose per CT procedure
Choice B:Decrease in number of CT procedures compared to NCRP 160
Choice C:Decrease in US population
Question 2: Based on the NCRP Report #184 on per capita medical imaging (using ionizing radiation) for the population between 2006 and 2016, which one of the following is most correct regarding the modality with the greatest factors contributing to uncertainties in dose estimation?
Reference:1. National Council on Radiation Protection and Measurements. Medical Radiation Exposure of Patients in the United States, NCRP Report 184, Bethesda, Md: National Council on Radiation Protection and Measurements, 2019. 2. Mettler, FA, Mahesh M, Frush DP et al., Patient exposure from radiologic and nuclear medicine procedures in the United States: procedure volume and effective dose for the period 2006-2016. Radiology 2020; 295: 418-427. PMID: 32181730.
Choice A:Radiography Procedures
Choice B:Interventional Procedures
Choice C:CT Procedures
Choice D:Nuclear Medicine Procedures
Question 3: 3. Which CT protocol had the greatest impact in the effective dose estimation due to change in the tissue weighting factors in ICRP 103 compared to ICRP 60?
Reference:1. National Council on Radiation Protection and Measurements. Medical Radiation Exposure of Patients in the United States, NCRP Report 184, Bethesda, Md: National Council on Radiation Protection and Measurements, 2019. 2. Mettler, FA, Mahesh M, Frush DP et al., Patient exposure from radiologic and nuclear medicine procedures in the United States: procedure volume and effective dose for the period 2006-2016. Radiology 2020; 295: 418-427. PMID: 32181730.
Choice A:Head CT
Choice B:Chest CT
Choice C:Abdomen-Pelvis CT
Choice D:Extremity CT
Question 4: Based on the NCRP Report #184 on per capita medical imaging (using ionizing radiation) for the pediatric (< 18 yrs) population between 2006 and 2016, which one of the following is most correct?
Reference:1. National Council on Radiation Protection and Measurements. Medical Radiation Exposure of Patients in the United States, NCRP Report 184, Bethesda, Md: National Council on Radiation Protection and Measurements, 2019. 2. Mettler, FA, Mahesh M, Frush DP et al., Patient exposure from radiologic and nuclear medicine procedures in the United States: procedure volume and effective dose for the period 2006-2016. Radiology 2020; 295: 418-427. PMID: 32181730.
Choice A:CT accounts for an estimated 84% of the collective medical radiation exposure.
Choice B:Radiography accounts for approximately 86% of ionizing radiation imaging procedures in children.
Choice C:The collective effective dose from medical exposures is estimated to be 3% of the total collective dose to the US population
Choice D:All of above
Question 5: Based on the NCRP Report #184 on per capita medical imaging (using ionizing radiation) for the adult population between 2006 and 2016, which one of the following is most correct?
Reference:1. National Council on Radiation Protection and Measurements. Medical Radiation Exposure of Patients in the United States, NCRP Report 184, Bethesda, Md: National Council on Radiation Protection and Measurements, 2019. 2. Mettler, FA, Mahesh M, Frush DP et al., Patient exposure from radiologic and nuclear medicine procedures in the United States: procedure volume and effective dose for the period 2006-2016. Radiology 2020; 295: 418-427. PMID: 32181730.
Choice A:Radiography procedures increased by more than 15%
Choice B:CT procedures decreased by nearly 20%
Choice C:Nuclear medicine procedures decreased by nearly 50%
Choice D:Cardiac interventional procedures increased by 30%
Question 6: Based on the NCRP Report #184 on per capita medical imaging (using ionizing radiation) for the pediatric (< 18 yrs) population between 2006 and 2016, which one of the following is most correct?
Reference:1. National Council on Radiation Protection and Measurements. Medical Radiation Exposure of Patients in the United States, NCRP Report 184, Bethesda, Md: National Council on Radiation Protection and Measurements, 2019. 2. Mettler, FA, Mahesh M, Frush DP et al., Patient exposure from radiologic and nuclear medicine procedures in the United States: procedure volume and effective dose for the period 2006-2016. Radiology 2020; 295: 418-427. PMID: 32181730.
Choice A:Reduction of about 20% in estimated annual per capita effective dose in the decade from 2006-2016 is similar in children and adults.
Choice B:Pediatric CT accounts for about 6% of all CT performed
Choice C:Decrease in CT use accounts for a substantial decline in the decrease in collective dose between 2006-2016 in both adults and children.
Choice D:Similar uncertainties are due to similar sources of information
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