Objective To understand the occupational external exposure dose of X-ray radiation workers from medical institutions in Urumqi City from 2010 to 2013, and provide a scientific basis for radiation protection.
Methods A total of 373 X-ray radiation workers from 41 medical institutions in Urumqi City were recruited to determine individual dose with thermoluminescent personal dosimeter and evaluate the results according to the national standard Specifications of Individual Monitoring for Occupational External Exposure(GBZ 128-2002). Statistical analysis on radiation workers of different monitoring years, medical institution levels, and types of work were performed by variance of analysis.
Results From 2010 to 2013 in Urumqi City, the selected X-ray radiation workers' per capita annual effective doses were lower than the national standard limit(20 mSv). In terms of medical institution levels, those from tertiary medical institutions presented highest per capita annual effective dose of(0.97& #177; 0.54) mSv, followed by those from secondary medical institutions of(0.91& #177;0.23) mSv and those from primary medical institutions of(0.71& #177;0.22) mSv. In terms of types of work, the per capita annual effective dose from high to low were interventional radiological operation (1.39& #177;0.62) mSv, X ray photography (0.85& #177;0.28) mSv, and dental diagnosis (0.65& #177;0.22) mSv.
Conclusion Varied monitoring results of individual exposure doses are detected among the X-ray radiation workers grouped by monitoring year, medical institution, and type of work, but all are lower than the radiological health protection standard in China.
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