Abstract: We monitored the occupational external exposure in a hospital in Chongqing from 2012 to 2018, using the routinepersonal dosemonitoring method. The results show that the average annual effective dose of radiation diagnosis and treatment staff is 0.3 to 0.8 mSv, which is far below thenational limit. The most exposed is turn out to be those dedicated to interventional radiology, which is followed in turn by radiotherapy, nuclear medicine and radiological diagnosis.

Key words: Radiation workers, Thermoluminescence dosimeter, Occupational exposure, Effective dose