基于MSCT容积重建技术的中国汉族男性60岁判别方法

Estimation of 60-year-old Chinese Han Male by MSCT Volume Reconstruction Technology

本文应用MSCT(多层螺旋CT)容积重建技术寻找与中老年男性年龄变化相关性较好的观测点位,构建单指标及多指标联合应用的中国汉族男性60岁判别式。收集177例40~70岁中国男性盆部MSCT扫描的医学数字成像和通信(digital imaging and communication in medicine,DICOM)原始影像数据,应用OsiriXMD v13.0.0软件进行容积重建,筛选出与年龄变化高度相关的点位,进行形态学观测,构建分级标准,最后采用Fisher判别法,构建60岁判别模型。最终筛选出第五腰椎、髂嵴后部及部分骶翼三个观测点位,分别构建中国男性60岁单指标及多指标联合应用判别模型。第五腰椎、髂嵴后部及部分骶翼单指标判别率分别为80.8%、78.0%、87.0%,三个指标联合应用判别率为91.0%。研究结果证明,应用MSCT容积重建技术,通过观测第五腰椎、髂嵴后部及部分骶翼,判别中国男性60岁年龄点,具有较好的可行性及准确性,可用于相关案件的判别。

The paper aims tofind the observation sites with significant age changes in middle-aged and elderly men by using MSCT volume reconstruction technology,and to construct estimation method combining single index and multiple index of 60-years-old Chinese male.According to the sample screening criteria,digital imaging and communication in medicine(DICOM)data with pelvic MSCT scanning from 177 Chinese men aged from 40 to 70 years were collected.OsiriX MDv13.0.0 software was used for volume reconstruction;the classification standard was constructed by morphological observation.SPSS software was used for general descriptive statistical analysis of the observation indicators of the sample.Spearman test was used for correlation analysis,and sites highly correlating with age change were selected.Finally Fisher stepwise discriminant method was used to construct the single index and multiple index stepwise 60-year-old discriminant models.Ultimately,three observation sites of thefifth lumbar vertebra,posterior iliac crest and part of the sacral alar were selected to construct the discrimination model.The discriminant rates of thefifth lumbar spine,posterior iliac crest and part of ala of sacrum were 80.8%,78.0%and 87.0%,respectively,and the discriminant rates of multi-index with the three sites were 91.0%.According to the analysis of the above data,multi-index discrimination can be thefirst choice in practical application,and single index discrimination can be used when some observation indicators are lost due to skeletal remains.Using this model,10 actual cases(covering the whole age group from 40 to 70 years old)were selected to verify the accuracy rate,especially the samples aged from 50 to 70 years old,and the results were satisfactory.In conclusion,the application of MSCT volume reconstruction technique to determine the age point of Chinese men at 60 years old by observing thefifth lumbar vertebra,the posterior part of the iliac crest and part of the ala of sacrum has high feasibility and accuracy.This method uses virtual anatomy as the technical support,which eliminates the complex process of bone processing,thus reducing the probability of incorrect age estimation due to improper bone processing.It provides a new method for solving such problems in actual cases.