中国医疗设备2024，Vol.39Issue(1)：133-137,171,6.DOI:10.3969/j.issn.1674-1633.2024.01.023
儿童腹盆部CT辐射剂量指标的比较及回归方程的建立与分析
Comparison of CT Radiation Dose Index in Abdomen and Pelvis of Children and Establishment and Analysis of Regression Equations
摘要
Abstract
Objective To compare the difference of volume CT dose index(CTDIvol)and size-specific dose estimate(SSDE)based on water equivalent diameter(WED)(that is SSDEWED)in measuring radiation dose in abdomen and pelvis of children,and to explore the feasibility of calculating CTDIvol and SSDEWED based on age.Methods The CT imaging data of 812 children who underwent abdomen and pelvis examinations from January to December of the 2021 were retrospectively collected.The age,CTDIvol were recorded;Area of Interest(AROI)and CT Value of ROI(CTROI)were measured,and SSDEWED were calculated to compare the differences in measured radiation dose between CTDIvol and SSDEWED.The correlation between CTDIvol,SSDEWED and age was analyzed,and the regression equations were generated,and then analyzed the consistency of the regression equations.Results The CTDIvol was(2.90±1.20)mGy and the SSDEWED was(5.64±1.90)mGy in 812 cases,and the difference was statistically significant(P﹤0.001).CTDIvol and SSDEWED increased with the increase of age,and the exponential function fitted well the correlation between CTDIvol,SSDEWED and age.The measured CTDIvol was(2.90±1.20)mGy,the calculated CTDIvol was(2.91±1.05)mGy,and there was no statistically significant difference(t=0.97,P=0.33);The measured SSDEWED was(5.64±1.90)mGy,the calculated SSDEWED was(5.58±1.35)mGy,and the difference was also no statistically significant(t=1.83,P=0.07).The age-based CTDIvol and SSDEWED had a strong correlations with the measured value(The correlation coefficients were 0.88 and 0.81,respectively).Conclusion Compared to CTDIvol,SSDEWED is more accurate in measuring the radiation dose in the abdomen and pelvis regions of children.Using age to predict the radiation dose index of a child can quickly estimate their radiation before examination,which plays an important role in better control of radiation dose.关键词
儿童辐射剂量/腹盆部/体层摄影术/X射线计算机/体型特异性剂量估算值Key words
children radiation dose/abdomen and pelvis/tomography/X-ray computed/size-specific dose estimate分类
医药卫生引用本文复制引用
张见,张晓军..儿童腹盆部CT辐射剂量指标的比较及回归方程的建立与分析[J].中国医疗设备,2024,39(1):133-137,171,6.基金项目
江苏省政府留学基金(JS-2018-137) （JS-2018-137）
江苏省妇幼保健课题(FYX201816) （FYX201816）
南京市医学科技发展基金(QRX17169). （QRX17169）
