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| Analysis of radionuclide concentration in workplaces of nuclear medicine in five provinces of China |
| ZHU Weiguo, HOU Changsong, TONG Peng, ZHANG Qingzhao, ZHANG Qi |
| Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088 China |
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Abstract Objective Through the investigation of some clinical nuclear medicine in 5 provinces in different regions of China, the activity concentration levels of the main radionuclides in the air in clinical nuclear medicine workplaces were obtained, and the dose levels of relevant personnel in clinical nuclear medicine were analyzed, so as to provide a basis for the establishment of clinical nuclear medicine protection standards suitable for China's national conditions.Methods Nine hospitals in 5 provinces which have carried out clinical nuclear medicine were selected to, take air samples from relevant sites, analyze the γ energy spectrum with the passive efficiency calibration method, to calculate the activity concentration distribution level of the concerned nuclides in the air in each site, and to evaluate the annual committed effective dose of the relevant site staff due to the radionuclide operation.Results Sampling and measurement were conducted in nuclear medicine-related workplaces of 9 medical institutions in 5 provinces which carried out clinical nuclear medicine. The maximum annual committed effective dose per year of hospital staff who engaged in 131I treatment was 1.67×10−1 mSv. The maximum annual committed effective dose per year of hospital staff who engaged in 99Tcm diagnosis was 2.80×10−3 mSv.Conclusion The nuclide activity concentration level was different in different hospitals and places. Under normal working conditions, the annual committed effective dose of nuclear medicine workers in the nuclear medicine workplace of the nine hospitals in five provinces was much lower than the national standard limits for individual dose.
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Received: 25 January 2020
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