2015年广西数字化摄影受检者入射体表剂量水平调查与分析

Investigation and Analysis About Entrance Surface Dose Induced by Medical Digital Radiography in Guangxi 2015

目的了解广西地区数字化摄影(DR)所致受检者的入射体表剂量水平。方法采用分层随机抽样方法,选取广西区内14家医院不同时间段进行DR检查的受检者,使用热释光剂量计测量受检者不同部位的入射体表剂量。结果广西地区一级医院的头颅(PA)、头颅(LAT)、胸部(PA)、胸部(LAT)、胸椎(AP)、腰椎(AP)6个部位入射体表剂量的75%位值超出了国家医疗照射指导水平;二级和三级医院的胸部(PA)和胸部(LAT)两个部位入射体表剂量的75%位值超出国家医疗照射指导水平。结论广西地区DR摄影的入射体表剂量较高,应进一步加强受检者的入射体表剂量监测。

Objective To acquire information about the entrance surface dose level induced by medical digital radiography（DR） in Guangxi.Methods Stratified random sampling method is used.We choose the subjects examined by DR on different time in fourteen hospitals in Guangxi,using thermoluminescence dosimeter to measure subjects＇ entrance surface dose in different parts.Results There are head（PA） 、head（LAT）、chest（PA） 、chest（LAT）、thoracicvertebra（AP）、lumbarvertebra（AP） of which the amount to six parts＇ entrance surface dose of 75% bit value exceeds the national guidance levels for medical exposure in the grade-one hospitals;there are chest（PA） andchest（LAT） amount to two parts＇ entrance surface dose of 75% bit value exceeds the national guidance levels for medical exposure in the grade-two hospitals and grade-three hospitals.Conclusion The entrance surface dose of DR photography in Guangxi is hight.We should a further strengthen the monitoring plan about the entrance surface dose.