2013年珠三角某市CT机房外环境辐射水平分析  

Analysis on Radiation Levels in the Outside Environment of CT Machine Room in a City of fhe Pearl River Delta,2013

作　　者：郑海英[1] 温小庭[1] 周郁潮[1] 陈斯敏[1] 苏秀群[1] 褥善玲 

机构地区：[1]中山市疾病预防控制中心,广东中山528400 [2]广东医学院,广东东莞523000

出　　处：《预防医学论坛》2015年第8期566-567,572,共3页Preventive Medicine Tribune

基　　金：中山市科技计划项目(20132A075)

摘　　要：目的为了解珠三角某市CT机房外环境的辐射水平,并对存在的问题提出改进意见。方法按照GBZ 165-2012《X射线计算机断层摄影放射防护要求》、GBZ 130-2013《医用X射线诊断放射防护要求》的标准要求(距机房外表面0.3m处周围剂量当量率应小于2.5μSv/h)对珠三角某市辖区内37台CT机的机房外周围辐射水平进行检测,CT机房外环境辐射水平进行检测及评价。结果 CT机房外环境存在射线泄漏情况的位置有机房防护门、控制室防护门、机房上方、邻室、医生观察窗,其泄漏率分别为17.30%(32/185)、6.49%(12/185)、4.50%(5/111)、3.60%(8/222)、0.54%(1/185),超标的位置为机房防护门,超标率为5.41%(10/185)。结论有关部门须重视CT机机房外环境辐射危害,确保机房外人员健康与安全。Objective To understand the radiation levels in CT room of outside environment in a city of the Pearl River Delta,and put forward the suggestions on improving existing problems. Methods According to the X-ray computed tomogra ph y （ CT） radiation protection requirements GBZ 165-2012 and the medical diagnostic X-ray radiation protection requirements standard of GBZ 130-2013 requirements from 0.3 m to the external surface of the room ambient close equiva lent rate should be less than 2.5 μ Sv/h）on CT room environmental radiation levels were tested and evaluated. Results CT room outside the environment in the presence of the location of leakage of the engine room, control room, control room,room, adjacent room, the doctor observation window, the leakage rate was 17.30% （32/185）, 6.49% （12/185）, 4.50%（5/111）,0.54%（8/222）,and3.60%（1/185）,exceedingthestandardrateof5.41%（10/185）. Conclusion Rel- evant departments should attach importance to environmental radiation CT machine outside the room and ensure the health and safety of the personnel outside the engine room.

关 键 词：CT机 机房外环境 辐射水平 

分 类 号：R144.1[医药卫生—公共卫生与预防医学]