儿童肺部CT定位像精准扫描策略  

Accurate Scanning Strategy of Lung CT Localization Image in Children

作　　者：刘杰[1] 王颖 边传振 刘鹏[1] LIU Jie;WANG Ying;BIAN Chuanzhen;LIU Peng(Department of Radiology,Children's Hospital Affiliated of Nanjing Medical University,Nanjing Jiangsu 210008,China)

机构地区：[1]南京医科大学附属儿童医院放射科,江苏南京210008

出　　处：《中国医疗设备》2020年第10期100-102,138,共4页China Medical Devices

摘　　要：目的为儿童肺部CT定位像扫描确定精准扫描方案。方法回顾分析618例儿童肺部CT图像,将其分为男性组与女性组,记录所有患儿年龄M(月)和身高H(cm),并测量实际肺野范围(cm)(以第七颈椎下缘至肺底的范围作为实际肺野)。利用二元线性回归分析肺野范围与年龄和身高的关系,获得关系方程。另随机选取男女各50例,根据线性方程计算的范围进行CT定位像扫描,并与实际肺野进行配对t检验,以P<0.05作为差异显著的标准。结果肺野范围(Y)与身高(H)及年龄(M)的回归方程为,男性:Y=0.087H+0.056M+3.4;女性:Y=0.088H+0.045M+3.1。回归方程所得精准扫描肺野范围与实际范围差异无统计学意义,P>0.05。结论儿童肺部扫描时,根据年龄、身高可精准确定定位像扫描范围,有效规避常规经验扫描的误差,减少不必要的辐射。Objective To determine the accurate scanning scheme for CT localization image of children’s lung.Methods The lung CT images of 618 children were analyzed and divided into male group and female group.The age M(month)and height H(cm)of all children were recorded,and the actual lung field range(cm)(the range from the lower edge of the seventh cervical vertebra to the bottom of the lung)was measured.Binary linear regression was used to analyze the relationship between lung field range and age and height.In addition,50 male and 50 female patients were randomly selected.According to the range calculated by linear equation,the CT localization image was scanned,and paired t test was performed with the actual lung field,with P<0.05 as the standard of significant difference.Results The regression equation of lung field range(Y)with height(H)and age(M)was Y=0.087 H+0.056 M+3.4 for male and Y=0.088 H+0.045 M+3.1 for female.There was no significant difference between the precise scanning range of lung field and the actual range,P>0.05.Conclusion In children’s lung scanning,the scanning range of localization image can be accurately determined according to the age and height,which can effectively avoid the error of conventional empirical scanning and reduce unnecessary radiation.

关 键 词：儿童 肺野范围 CT定位像 辐射剂量 

分 类 号：R4[医药卫生—临床医学]