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| Investigation and Analysis on the Abnormal Increase of Dose Equivalent Rate around a Medical X-ray Diagnostic Room |
| LI Jin-rong, Mo Su-fang, ZHANG Jing-bo, WANG Chang |
| Radiological Health Department, Guangzhou Center for Disease Control and Prevention, Guangzhou 510440 China |
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Abstract Objective To investigate the reason of abnormal increase of dose equivalent rate in one institution's medical X-ray diagnosis machine room in Guangzhou.Methods To collect the information of the X-ray diagnosis machine room, including radiological protection design、construction plan and drawings, etc and analyze by using occupational health survey method, combining with monitoring results of radiation around the room.Results The results of the occupational health survey showed that all shields surrounding machine room were in confomity with the requirements of the national standard. The reason of abnormal increase of the dose equivalent rate around the medical X-ray diagnosis machine room was the unreasonable setting of the machine room. The direction of X-ray directly leading to the location of room door.Conclusion It shoulal stengthen the implementation medical X-ray diagnosis of occupational hazard in the room radiation protection pre-assessment system, standardize the layout of machine room, set the installation of medical X-ray machine reasonably.
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Received: 14 August 2016
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