儿童胸部CT辐射剂量调查

目的 通过调查我省儿童胸部CT辐射剂量情况，一定程度上反映我省儿童CT辐射剂量情况，从而研究儿童CT辐射防护最优化方案。方法 选择省内5家综合性医院，5家儿童医院，通过医院CT医学影像系统随机选择五个年龄段中接受胸部CT检查的受检者，针对样本受检者剂量报告中显示数据进行统计建立数据库。用SPSS 18.0软件对数据进行分析。结果 15～70岁组与其他四组比较，CTDI_vol和DLP，差异均有统计学意义；儿童年龄段（0～1，1～5，5～10，10～15岁组）中，两个相邻年龄段CTDI_vol比较，差异无统计学意义。1～5岁组与5～10岁组DLP比较，5～10岁组与10～15岁组DLP比较，差异无统计学意义。结论 研究制定一部专门针对儿童CT辐射防护的标准，进一步指导儿童CT检查的工作的发展。医疗机构在此基础上，更加细致完善儿童CT检查工作。

Investigation of CT radiation dose in chest of children

Objective To reflect the CT radiation dose of children in our province and study the optimal CT radiation protection program for children by investigating the CT radiation dose of children's chest.Methods 5 comprehensive hospitals and 5 children's hospitals in our province were selected and randomly selected patients who received chest CT examination in five groups through the CT medical imaging system of the hospital. Finally the data in the dose report were analyzed through SPSS 18.0 software.Results The difference of the CTDI_vol and DLP between the 15～70 age group and the other four groups was statistically significant; The difference of the CTDI_vol between the any two adjacent age groups was no statistically significant in children's age group(0～1, 1～5, 5～10, 10～15). There was no statistically significant difference between the DLP in 1～5 group and in 5～10 group, as same as the difference between the DLP in 5～10 group and in 10～15 group.Conclusion To guide the development of children CT examination, a child specific standard for CT radiation protection should be worked out. More detailed jobs of children CT examination should be improved on the basis of this study.