Ambient radiation of patients undergoing 18F-FDG PET/CT myocardial metabolism imaging
10.13491/j.issn.1004-714X.2022.02.011
- VernacularTitle:18F-FDG PET/CT心肌代谢显像受检者的周围辐射剂量水平
- Author:
Xinyu HE
1
;
Yingfei PI
2
;
Xue CAO
2
;
Yunyun WU
1
;
Xiaoyan JIANG
1
;
Mingkai YUN
2
;
Xiaoli ZHANG
2
;
Kuke DING
1
Author Information
1. Department of Radioecology National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088 China.
2. Department of Nuclear Medicine, Beijing AnzhenHospital, Capital Medical University, Beijing 100029 China.
- Publication Type:OriginalArticles
- Keywords:
Nuclear medicine;
Radiation protection;
Ambient dose equivalent rate;
Myocardial metabolism imaging
- From:
Chinese Journal of Radiological Health
2022;31(2):192-196
- CountryChina
- Language:Chinese
-
Abstract:
Objective To study the ambient radiation of patients undergoing 18F-FDG PET/CT myocardial metabolism imaging, and to provide data for protection of surrounding people against radiation. Methods A total of 33 patients were selected for 18F-FDG PET/CT myocardial metabolism imaging. Dose equivalent rate was measured at the height of patient chest, in different directions, at different time points and at different distances, to investigate the distribution of ambient radiation of the patient. Results At the same time point and distance, the dose equivalent rates at the left and right sides of the patient were lower than the front and back sides. The dose equivalent rate at 1 m in front of the patient was 13-21 μSv/h after 18F-FDG injection, and decreased to 5-14 μSv/h after PET/CT imaging, with a mean decrease of 46%. The ambient dose equivalent rate decreased exponentially with distance (10~300 cm), and the mean power was −1.2. Conclusion The ambient radiation of patients undergoing 18F-FDG PET/CT myocardial metabolism imaging was high after 18F-FDG injection, and the ambient dose equivalent rate decreased rapidly with time and distance. Our results suggest that patients undergoing myocardial metabolism imaging should avoid prolonged and close contact with other people on the day of examination.
