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| Study on radiation risk assessment of digital subtraction angiography in a medical institution |
| HUANG Zipei1,2, YANG Yuhua1, LI Xiaohua1,2, CHEN Huifeng1, LIN Haihui1, XIA Bing1 |
1. Guangdong Province Hospital for Occupational Disease Prevention and Treatment, Guangdong Provincial Key Laboratory of Occupational Disease Prevention and Treatment, Guangzhou 510300 China;
2. School of Public Health, Guangdong Pharmaceutical University |
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Abstract Objective In order to assess the radiation risk level in a medical institution and provide scientific basis for the radiation protection work of DSA in medical institutions.Methods To investigate the DSA radiation protection information and radiation accident history data and monitor dose on site of a hospital in Guangzhou. With reference to relevant national regulations and standards, DSA radiation risk factors were identified, analyzed and evaluated by AS/NZS ISO31000:2009 risk assessment index matrix method, and control countermeasures were proposed.Results The range of ambient dose equivalent rate around each detection points outside DSA room was 0.17～1.69 μSv/h. In the near-stage and in-room operation, the dose equivalent rate was 95～153 μGy/h for the first operator and 82～318 μGy/h for the second operator. The annual effective dose of radiation workers ranged from 0.16～1.12 mSv, and the average annual effective dose was (0.49 ±0.31) mSv. The radiation protection measures are reasonable and effective, and the staffs are in good health and basically meet the requirements of relevant regulations and standards. Radiation risk factors of DSA in this hospital mainly come from the following four aspects: equipment safety, environmental safety and protection, personnel safety and protection, safety and emergency management. It was preliminarily determined that high-risk events include: unstable safety of equipment parameters, lack or failure of personal protective equipment, lack of professional skills or misoperation, increased fluoroscopy time due to complex surgery, lack of safety protection awareness and no radiation accident emergency plan.Conclusion The radiation risk assessment system was preliminarily established, which can evaluate the radiation risk level of the DSA room of the hospital relatively efficiently.
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Received: 27 January 2020
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