基于CT-3D VRT测量髌骨推断四川汉族人群性别

Estimation of Sex from Patella Measurements in Sichuan Han Population Basedon CT-Three-Dimensional Volume Reconstruction Technique

目的应用计算机断层扫描(computed tomography,CT)三维容积重建技术测量髌骨推断四川汉族人群的性别,探索髌骨在性别推断中的应用价值。方法收集250例髌骨CT三维容积重建影像,通过测量髌骨长、髌骨宽、髌骨厚以及髌骨体积4项测量指标,运用t检验筛选出具有性别差异的测量指标,利用Fisher判别分析建立性别判别函数,并通过留一交叉验证法计算判别准确率。结果4项指标的性别差异均具有统计学意义(P<0.05)。以髌骨长建立的单指标判别方程准确率最高(82.0%)。全指标判别方程以及逐步判别方程的性别判别准确率分别为80.4%和81.6%。结论应用CT三维容积重建技术测量髌骨推断四川汉族人群的性别具有较高的可行性和准确性,在缺乏其他准确性更高骨骼的情况下,可作为四川汉族人群性别推断的替代方法。

Objective To estimate sex based on patella measurements of Sichuan Han population by computed tomography three-dimensional volume reconstruction technique,and to explore the application value of patella in sex estimation.Methods CT three-dimensional volume reconstruction images of patella of 250 individuals were collected,the four measurement indicators including patellar length,patellar width,patellar thickness,and patellar volume were measured.The t-test was used to determine measurement indicators with sex differences.Fisher discriminant analysis was used to establish the sex discriminant function and the prediction accuracy was calculated by leave-one-out cross validation.Results The sex differences of the four measurement indicators had a statistical significance(P<0.05).The accuracy rate of the univariate discriminant function established by the patellar length was the highest(82.0%).The accuracy rates of the all indicators discriminant function and the stepwise discriminant function were 80.4%and 81.6%,respectively.Conclusion It is feasible and accurate to estimate sex of Sichuan Han population by patella measurements with CT three-dimensional volume reconstruction technique.The method may be used as an alternative for sex estimation of Sichuan Han population when other bones with higher accuracy are not available.