| Li Xiaoliang,Sun Weihang,Li Zeshu,Tuo Fei,Peng Xuan,Min Nan,Liu Jianxiang,Sun Quanfu.Measurement of 131I activity in thyroid of workers at the place of radioiodine therapy in six hospitals[J].Chinese Journal of Radiological Medicine and Protection,2022,42(6):448-453 |
| Measurement of 131I activity in thyroid of workers at the place of radioiodine therapy in six hospitals |
| Received:September 08, 2021 |
| DOI：10.3760/cma.j.cn112271-20210908-00371 |
| KeyWords:Nuclear medicine Thyroid 131I Internal exposure |
| FundProject: |
| Author Name | Affiliation | E-mail | | Li Xiaoliang | 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 | | | Sun Weihang | Institute of Radiation Medicine, Shandong Academy of Medical Sciences, Jinan 250001, China | | | Li Zeshu | 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 | | | Tuo Fei | 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 | | | Peng Xuan | 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 | | | Min Nan | Institute of Radiation Medicine, Shandong Academy of Medical Sciences, Jinan 250001, China | | | Liu Jianxiang | 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 | | | Sun Quanfu | 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 | sunquanfu@nirp.chinacdc.cn |
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| Abstract:: |
| Objective To investigate 131I activity in thyroid of workers at the place of radioiodine therapy and its main influencing factors.Methods In terms of the types of hospitals, six hospitals that performed radioiodine therapy procedure were selected by quota sampling in the provinces of Shandong and Shanxi. 131I activity in thyroids of 76 workers at the place of radioiodine therapy was measured directly, and their internal doses were estimated.Results 131I activity in thyroids was found to be above the detection limit for 29 subjects (38.16%) in five hospitals. The maximum value of 131I activity was 2 468.45 Bq for a doctor who was responsible for manual distribution of radioisotopes. In general 131I activities in thyroid of workers at the place of radioiodine therapy of six hospitals were not significantly different (P > 0.05). But the measurement result in the hospitals where radioiodine was distributed manually were significantly higher than that in the hospitals where radioiodine was distributed automatically (Z=1.75, P < 0.01). Thyroid measurement result of 12 workers in two hospitals where radioiodine was distributed manually were all above the detection limit, with medians of 324.59 Bq and 331.98 Bq, respectively. The medians of 131I activities in thyroid of 12 staff in the remaining 4 hospitals were all below the detection limit. The detection frequencies of 131I above dose limit were 32.61%, 25.00%, 10.00% and 0. The measurement result for the doctors who participated in distributing 131I and the relevent cleaners were significantly higher than for the doctors who did not participate in distributing 131I at the same hospital (Z=2.44, 2.12, P < 0.05).Conclusions There was a significant difference in the internal exposure level among workers at the different places of radioiodine therapy. Using automatic loading device could reduce the internal exposure level of the workers at the place of radioiodine therapy. It is necessary to strengthen the radiological protection for workers at the control area of the place of radioiodine therapy. |
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