Room: AAPM ePoster Library
Purpose: analyze usage of cardiovascular SPECT-CT examinations in Korea and to estimate radiation dose to Korean population due to the use of radiopharmaceuticals using effective dose conversion factor of ICRP.
Methods: SPECT-CT examinations such as myocardial scan and gated cardiac blood pool scan were selected for this study. Raw data of cardiovascular SPECT-CT examinations was collected from Health Insurance Review and Assessment Service. The data was analyzed using SAS program. Nation-wide average value of activity of radiopharmaceuticals per examination was collected. Dose conversion factor for each radiopharmaceutical by ICRP was used to estimate radiation dose.
Results: usage of the cardiovascular SPECT-CT examination was found to about 79,000 cases per year. Myocardial SPECT examinations accounted for more than 80% of the usage. The effective doses were high for myocardial SPECT with pharmacologic stress (8.3 mSv), whole body blood pool scan and SPECT (7.2 mSv), and myocardial SPECT with exercise (4.9 mSv). The collective dose of cardiovascular SPECT-CT examination was about 0.52 million person-Sv and effective dose per capita was 10.1 µSv. The collective dose and the effective dose per capita were high for myocardial SPECT with pharmacologic stress (54%) and myocardial SPECT with resting and gate (36%).
Conclusion: doses to Korean population by cardiovascular SPECT-CT examinations were estimated. The results of this study can be used for patient dose management in the nuclear medicine. In addition, It can contribute to the reduction of patient doses.
Funding Support, Disclosures, and Conflict of Interest: This work was supported by the Nuclear Safety Research Program through the Korea Foundation Of Nuclear Safety (KoFONS) using the financial resource granted by the Nuclear Safety and Security Commission (NSSC) of the Republic of Korea. (No. 1803013)