摘要
目的通过对上海市所有辖区内公立医疗机构CT设备常见扫描部位的剂量参数调查,分析上海地区成人CT扫描剂量分布,为建立上海市CT扫描诊断参考水平提供依据。方法在上海所有辖区(共16个区)分别选取至少1家开展CT放射诊疗的医疗机构,每家医疗机构抽取1台年度状态检测合格的CT设备开展头颅、胸部、腹部、腰椎扫描受检者进行剂量调查,收集受检者基本信息、CT扫描参数、容积CT剂量指数(CTDI^(vol))和剂量长度乘积(DLP)等剂量指标。结果共收集1475例CT受检者扫描数据,头颅、胸部、腹部和腰椎的CTDI^(vol)的75%位数分别为57 mGy、11 mGy、16 mGy和23 mGy;DLP的75%位数分别为862 mGy·cm、361 mGy·cm、593 mGy·cm和550 mGy·cm。结论不同扫描部位的CTDI^(vol)和DLP存在显著差别,相同部位扫描的CTDI^(vol)和DLP也存在较大差异,男性DLP略高于女性。
Objective To investigate dose parameters in computed tomography(CT)scanning of common body parts inall public medical institutions in Shanghai,China,and analyze the dose distribution of CT scanning among adult subjects in Shanghai,and to provide a basis for establishing the diagnostic reference levels of CT scanning in Shanghai.Methods We selected at least one medical institution with CT services each from all 16 districts of Shanghai.In each medical institution,a piece of CT equipment with qualified annual inspection was sampled to investigate the doses to subjects in head,chest,abdomen,and lumbar spine scanning.We collected the basic information of the subjects,CT scanning parameters,volumetric CT dose index(CTDI^(vol)),and dose length product(DLP).Results The scanning data of 1475 subjects were obtained.The 75th percentiles of the CTDI^(vol)of the head,chest,abdomen,and lumbar spine were 57 mGy,11 mGy,16 mGy,and 23 mGy,respectively.The 75th percentiles of the DLP were 862 mGy·cm,361 mGy·cm,593 mGy·cm,and 550 mGy·cm,respectively.Conclusion CTDI^(vol)and DLP differed significantly at different body parts,and also differed greatly at the same body parts.The DLP of men was slightly higher than that of women.
作者
钱爱君
高林峰
姚杰
温学新
王彬
肖虹
蒋舟
QIAN Aijun;GAO Linfeng;YAO Jie;WEN Xuexin;WANG Bin;XIAO Hong;JIANG Zhou(Shanghai Municipal Center for Disease Control and Prevention,Shanghai 200336 China;Hongkou District Center for Disease Control and Prevention,Shanghai 200082 China)
出处
《中国辐射卫生》
2022年第5期587-591,共5页
Chinese Journal of Radiological Health
基金
上海市公共卫生体系建设三年行动计划优秀学科带头人计划(项目编号:GWV-10.2-XD16)
上海市公共卫生重点学科建设计划项目(项目编号:GWV-10.1-XK10)
关键词
CT
辐射剂量
诊断参考水平
剂量长度乘积
CT
Radiation dose
Diagnostic reference level
Dose length product
