青岛市部分医疗机构CT检查成人诊断参考水平的前期调查  

Preliminary investigation of adult CT diagnostic reference levels in selected institutions in Qingdao City,China

作　　者：刘筱钰 张秀云 张栋 王国华[4] 车紫荆 刘珍友[3] LIU Xiaoyu;ZHANG Xiuyun;ZHANG Dong;WANG Guohua;CHE Zijing;LIU Zhenyou(The Children’s Hospital of Fudan University,Shanghai 201102 China;Qingdao Central Medical Group,Qingdao 266042 China;Qingdao 8th People’s Hospital,Qingdao 266121 China;Qingdao Municipal Hospital,Qingdao 266071 China)

机构地区：[1]复旦大学附属儿科医院,上海201102 [2]青岛市中心医疗集团,山东青岛266042 [3]青岛市第八人民医院,山东青岛266121 [4]青岛市市立医院,山东青岛266071

出　　处：《中国辐射卫生》2024年第4期409-414,425,共7页Chinese Journal of Radiological Health

基　　金：中国疾病预防控制中心公共卫生领域卫生健康标准化研究前期项目,项目编号BZ2022-Q028。

摘　　要：目的为制定符合青岛市国民体质特征的X射线计算机断层摄影(CT)辐射剂量诊断参考水平提供数据基础。方法随机选取2022年1月1日—2022年12月31日青岛市3家综合性三级医院和1家一级医院的成年人CT检查辐射剂量数据。共14台设备3351例,扫描部位包括颅脑、鼻窦、颈部、胸部、腹部、颈椎、腰椎、颅脑CTA、颈部CTA、肺动脉CTA和主动脉CTA。数据类型包括管电压(kV)、管电流时间积(mAs)、CTDIvol、DLP,并计算CTDIvol和DLP的第25%、第50%和第75%位分值。结果成人各部位DLP差距较大,由高向低依次为颅脑CTA、颅脑平扫、腹部、腰椎(螺旋扫描)、主动脉CTA、肺动脉CTA、鼻窦、胸部、颈椎(螺旋扫描)和颈部。颅脑DLP 75%位分值657.9 mGy·cm,颈部为228.1 mGy·cm。颅脑CTDIvol最大(75%位分值52.0 mGy),胸部CTDIvol最小(75%位分值8.2 mGy)。结论青岛市部分医疗机构成人各部位CTDIvol和DLP数据差异较大,CT辐射剂量与国内外其他地区比较处于较低水平。Objective To provide data base for the development of X-ray computed tomography(CT)diagnostic reference levels suitable for the physical characteristics of residents in Qingdao City,China.Methods A total of 3351 cases of adult CT scan data derived from 14 devices were randomly selected from three tertiary hospitals and one primary hospital from January 1 to December 31,2022.CT examination was performed on the brain,paranasal sinus,neck,chest,abdomen,cervical vertebrae,and lumbar vertebrae.The cases also included CT angiography(CTA)data on the brain,neck artery,pulmonary artery,and aorta.The data types included tube voltage(kV),effective tube current(mAs),computed tomography dose index volume(CTDIvol),and dose length product(DLP).The 1st,2nd,3rd quartile values of CTDIvol and DLP were calculated.Results Large differences were observed in DLP among different body parts of adults.The DLP value showed a descending order of craniocerebral CTA,craniocerebral CT,abdomen CT,lumbar vertebral spiral CT,aorta CTA,pulmonary artery CTA,paranasal sinus CT,chest CT,cervical vertebral spiral CT,and neck CT.The 3rd quartile DLP values of the brain and neck were 657.9 and 228.1 mGy·cm,respectively.The CTDIvol of the brain was largest(3rd quartile,52.0 mGy)and the CTDIvol of the chest was smallest(3rd quartile,8.2 mGy).Conclusion There are significant differences in CTDIvol and DLP between different body parts of adults in Qingdao City,and CT radiation dose levels are relatively low compared to other regions in China and other countries.

关 键 词：CT诊断参考水平 容积CT剂量指数 剂量长度乘积 

分 类 号：X591[环境科学与工程—环境工程]