Abstract: Objective To investigate the individual dose of external exposure of radiation worker in the nuclear medicine department of the Second Affiliated Hospital of Air Force Military Medical University from 2019 to 2021.Methods All the staff concerned were administered personal monitoring and analysis of external exposure. Results The annual effective dose per capita in the past 3 years was 1.04 mSv/a, 1.22 mSv/a and 1.19 mSv/a respectively. Among them, physicians were 0.85 mSv/a, technicians were 1.43 mSv/a, nurses were 1.42 mSv/a, and other personnel were 0.75 mSv/a. The difference between technician group and nurse group was significant. The results of the occupational health check-up were not significantly abnormal. Conclusion The average annual effective dose of external radiation of radiation worker in the hospital was within the limit of the national standard, and no abnormality in physical examination results. In comparison, technicians and nurses were exposed to higher doses in their daily work, so monitoring and radiation protection should be strengthened. At the same time, the practice activities should be further standardized in daily work to ensure occupational radiation safety.

Key words: Nuclear medicine, Individual dose, External irradiation, Occupational health