Investigation and analysis on the frequency and dose of medical exposure for radiologists in Langfang

Objective: To understand the medical exposure frequency of and individual external exposure dose of various radiologists in different level hospitals of Langfang city, so as to evaluate the occupational health risk of radiologists and to provide technical basis for radiation protection. Methods: The all medical exposure frequency and the external exposure personal dose of radiologists in 6 different level hospitals of Langfang in 2016 were investigated and the data were statistically analyzed. Results: Among all 6 hospitals, the average number of medical exposures per person of radiological diagnostics workers in the third, second and first level hospitals was 4217, 3066, 883 respectively. The number of medical exposures per person of the interventional radiologists of the third, second level hospitals was 174, 115 respectively. The number of medical exposures per person for radiotherapy workers in the third level hospital was 30. The annual effective dose range of various kinds of radiologists was 0.78 ∼ 1.29 mSv. The effective doses of single exposure for interventional, radiotherapy, dental and diagnostic radiation workers were 0.02 ∼ 0.039 mSv, 0.038 mSv, 0.0013 ∼ 0.0042 mSv, 0.00027 ∼ 0.0023 mSv respectively. Conclusion: The health risk of single exposure to ionizing radiation for radiologists engaged in intervention and radiotherapy is much higher than that of other radiologists. The interventional and radiotherapy workers and low-level hospitals should be given more attention to strengthen radiation protection. (authors)