应用CT三维重组技术判定胸骨性别的研究  

The study of sex determination of sternum based on CT 3D recombinant techniques

作　　者：王福磊[1] 郑君尧 苗春雨[1] 刘立志 张惠芹[3] 庞闽厦[4] 张继宗[5] 

机构地区：[1]北京市公安局,北京100740 [2]老河口市公安局刑警大队,湖北老河口441800 [3]中国人民公安大学,北京100038 [4]滨州医学院附属胜利油田中心医院,山东东营257034 [5]公安部物证鉴定中心,北京100038

出　　处：《中国法医学杂志》2017年第4期341-344,349,共5页Chinese Journal of Forensic Medicine

基　　金：北京市教育委员会共建项目专项资助(JD10 0410669)

摘　　要：目的建立利用三维重组形态学指标判定胸骨性别来源的方法,并对其判定效果进行评价,考察虚拟骨骼的法医学应用价值。方法应用胸部螺旋CT扫描图像,通过多层面重组法获取胸骨的二维影像,结合容积再现技术得出的三维模型,分别测量胸骨的全长、柄长、体长、柄最大宽、体最大宽、柄最大厚、体最大厚、体上端厚等8项指标,并计算出3个比值指标;筛选出其中有性别差异的指标,建立性别判别方程并评价其判别效果。结果 11个指标的性别差异均具有统计学意义(P<0.05),但以胸骨全长、胸骨体长、体最大厚及柄最大宽的判别效果较好。所建方程组中,全指标、长度指标判别方程及逐步判别方程的判别率较高,88.6%的判定率与近期国外有关性别判定研究的报道结果基本一致。结论应用多层螺旋CT三维重组技术判定国人胸骨性别具有较高的可行性和准确性,该技术有望应用于胸骨年龄推断及其它虚拟骨骼的研究。Objective The chief aim of the present work is to investigate features of sternum of Chinese adults and to establish the sex determination method to evaluate its effect based on 3D recombinant morphology indicators. Methods Based on chest spiral CT scans, 2D images of multi-level recombination and 3D model of volume rendering, the experiment concludes an sex determination equation from 8 measurement indicators of the sternum and 3 ratio indicators. The 8 measurement indicators include full-length, handle length, body length, maximum width of the handle, maximum width of the body, maximum thickness of the handle, maximum thickness of the body, and thickness of the upper body. Results According to the 11 indicators of sex differences in statistics（P〈0.05）, especially indicators of the full-length, body length, maximum width of the handle and maximum thickness of the body, the body＇s sex is easier to be determined. All indicators equations, length indicators discriminant equations and stepwise discriminant equations have higher reliable rate（88.6%） which was consistent with the recent foreign research reports. Conclusion The method of sex determination based on multislice spiral CT 3D recombinant techniques is practicable and has an relatively high accuracy. It is expected to be applied to researches in age estimation by sternum and other virtual bones.

关 键 词：法医人类学 性别判定 CT 三维重组 胸骨 

分 类 号：D919.4[医药卫生—法医学]