某医院15岁以下少年儿童CT扫描剂量诊断参考水平建立及其意义

摘要

[目的]分析某医院 1 5 岁以下少年儿童 CT 扫描辐射剂量诊断参考水平(DRL).[方法]分析相关文献,对某医院 1 5 岁以下少年儿童头颅、胸部、腹部经 CT 扫描剂量数据进行 DRL 分析,记录不同部位DRL值.[结果]1 5 岁以下少年儿童 DRL 分析:头颅 CT 扫描容积 CT 剂量指数(CTDIvol )的 DRL 为 6 2 .3 mGy,高于我国少年儿童平均DRL 39 mGy,剂量长度乘积(DLP)的DRL为714.4 mGy,低于我国少年儿童平均DLP 804 mGy;胸部 CT 扫描 CTDIvol的 DRL 为 7.4 mGy,高于我国少年儿童平均 DRL 4 mGy,DLP 的DRL为 227.4 mGy,高于我国少年儿童平均DRL 1 13 mGy;腹部 CT扫描 CTDIvol的 DRL为 10.4 mGy,高于我国少年儿童平均DRL 8 mGy,DLP的DRL为 395.1 mGy,低于我国少年儿童平均DRL 434 mGy.[结论]1 5 岁以下少年儿童头颅、胸部、腹部CT扫描剂量DRL整体水平高于国家平均水平,需要找出原因并在实际扫描中进行低剂量优化.%[Obj ective]To analyze the diagnostic reference level (DRL)of CT scan radiation dose for chil-dren under 1 5 years old in a hospital.[Methods]The related literatures were analyzed,and the DRL values of different parts of the skull,chest and abdomen of children under 1 5 years old in a hospital were recorded.[Re-sults]DRL analysis of children under 15 years old:The DRL of CTDIvol was 62.3 mGy,higher than the aver-age DRL of Chinese children and adolescents,the DRL of dose-length product (DLP)was 714.4 mGy,lower than the average DLP of Chinese children and adolescents,and the DRL of CTDIvol of chest CT scan was 7.4 mGy,higher than that of me.The average DRL of Chinese children and adolescents is 4 mGy,and that of DLP is 227.4 mGy,which was higher than that of Chinese children and adolescents.The average DRL of CTDIvol on abdominal CT scan was 10.4 mGy,which was higher than that of Chinese children and adolescents.The DRL of DLP was 395.1 mGy,which was lower than that of Chinese children and adolescents.[Conclusion]The o-verall level of DRL in CT scans of the head,chest and abdomen of children under 1 5 years old is higher than the national average level,so it is necessary to find out the reasons and optimize the low dose in the actual scans.