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| Analysis of individual external radiation dose of radiation staff and status of radiological diagnosis and treatment equipment in Luannan County in 2016 |
| MA Enhong, WANG Chunbo, FANG Yumei, ZHENG Yekun |
| Luannan County Center for Disease Control and prevention, Luannan 063500 China |
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Abstract Objective To investigate the individual external radiation dose level of radiation staff and the status of radiological diagnosis and treatment equipment in Luannan County, andto provide basis evidence for evaluating the current radiation protection situation in workplace.Methods According to the requirements of the "Specifications for individual monitoring of occupational external exposure"(GBZ 128-2016), dose level of occupational external exposure of all medical and health institutions in Luannan county were measured by thermoluminescence dose method.Results There are 30 radiological diagnosis and treatment units and 146 radiological staff in luannan county. 131 people among the staff were monitored and the monitoring rate was 89.73%. The collective annual dose equivalent was 51.97 mSv, and the average annual dose equivalent was 0.40 mSv. Among the staff, the annual dose equivalent of 128 was less than 2 mSv/person, and the annual dose equivalent of other 3 people was between 2~5 mSv, accounting for 2.29%, the annual dose of all the people was less than 5 mSv. About average annual dose equivalent, it was 0.36 mSv in the county hospital, and 0.44 mSv in the township hospita and 0.34 mSv in the dental clinic and 0.31 mSv in the individual clinic. Among the radiation staff, mainly the general staff, were 97, accounting for 74.05%, and the average annual dose equivalent was 0.38 mSv; 19 people were engaged in the CT and their average annual dose equivalent was 0.50 mSv; 9 people were engaged in interventional radiology and the average annual dose equivalent was 0.24 mSv; 4 full-time dental staff and their average annual dose equivalent was 0.34 mSv; 2 radiation therapy staff and their average annual dose equivalent was 1.04 mSv; By comparison, the difference in average annual dose equivalent between radiotherapy and other radiological staff was statistically significant (P<0.05).Conclusion The average annual effective dose of radiation staff in the county is far lower than the national standard limit, which indicates the radiation workplace environment is relatively safe.
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Received: 16 March 2018
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