关键词: 放射工作人员, 个人剂量监测, 异常剂量, 剂量核查

Abstract: Objective To analyze the abnormal results of external radiation personal dose monitoring in medical institutions in Zhenjiang City from 2019 to 2023,to find out the problems existed in the process of personal dose monitoring,and to provide a basis for radiation protection management. Methods From 2019 to 2023,the thermoluminescence dosimetry system was used to monitor the individual dose of external radiation to radiation workers,and the "Survey Level Dose Verification Registration Form" was used to investigate the personnel with a single monitoring cycle result of ≥1.25 mSv,and the data were analyzed. Result From 2019 to 2023,a total of 21 753 individual doses were monitored,including 457 person doses≥1.25 mSv. The abnormal dose results were mainly distributed in 1.25-5 mSv,with all abnormal dose values ≤50 mSv,and the M（P₂₅,P₇₅） of the abnormal dose value was 1.87（1.48,2.99）mSv. The occupational category of the abnormal dose was mainly engaged in diagnostic radiology（74.0%）. There was the largest number of abnormal doses in tertiary hospitals,accounting for 51.4% of the total abnormal doses. The main reason for the abnormal personal dose monitoring results was that the personal dosimeter was kept in the radiation workplace,accounting for 49.2% of the total abnormal patients. Followed by the abnormal dose caused by wearing personal dosimeter outside the current cycle,accounting for 35.9% of the total abnormal patients. Conclusions From 2019 to 2023,the radiation workplaces of medical institutions in Zhenjiang are generally at a relatively safe level,but the frequency of abnormal doses is relatively high. In the next step,we should continue to strengthen the management of personal dose monitoring to ensure the health and safety of radiation workers.

Key words: Radiology workers, Personal dose monitoring, Abnormal doses, Dose verification