2014年苏州市X射线摄影受检者剂量水平调查

A survey on patient exposure dose of X-rays photography in Suzhou,2014

目的了解X射线摄影检查中成人受检者的辐射水平,分析影响剂量水平的主要因素,为我国相关诊断项目所推荐的指导水平的更新提供数据。方法选取苏州市9家不同级别医疗机构,使用热释光剂量计,测量220名成年受检者不同部位的入射体表剂量(entrance surface dose,ESD),并记录相应的参数,分析影响ESD因素。结果不同部位检查,以腰椎(LAT)检查的ESD最高,胸部(PA)最小,差异具有统计学意义(F=16.56,P<0.05);每项检查均小于我国相应诊断项目所推荐的ESD指导水平。ESD均值与设备类型、医院级别以及主要摄影参数等的相关性均有统计学意义(P值均<0.05)。结论苏州市成人受检者X射线摄影的入射体表剂量水平低于我国现行推荐的指导水平。

Objective To investigate the patients＇ radiation exposure dose from X-rays photography in Suzhou;to analyze main factors affecting dose levels; to provide basic data for updating relevant guided levels of relavant diagnosis projects. Methods The entrance surface dose（ESD） of 220 adults taking X-rays photography were measured by thermoluminescent detectors （TLDs） from 9 hospitals of different grades in Suzhou; related parameters were recorded. The influential factors of ESDs were analyzed. Results Lumbar vertebra had the highest ESDs of while chest had the lowest ESDs among different body parts, with statistical difference （F = 16.56, P〈0. 05） ; ESDs of all body parts were below relevant guided levels of diagnosis projects in China. The mean ESDs were statistically correlated with equipment types, hospital grade and photographic parameters （all P〈0.05）. Conclusion Adult patients＇ ESDs in Suzhou by X-rays photography may be lower than relevant guided levels of diagnosis projects in China.