三维空间法在股骨颈前倾角测量中的应用

Three-dimensional measurement of femoral neck anteversion

目的 探讨数字化三维建模介导的三维空间法在股骨前倾角测量中的运用,为临床测量股骨颈前倾角提供高效方法.方法 健康志愿者10名,其中男5例,女5例;年龄18～60岁,平均43岁.行双侧股骨CT扫描,并将CT数据导入Mimics 17.0软件进行三维重建建模.以Murphy为原则分别采用传统Photoshop法和三维空间法测量股骨颈前倾角,比较两种方法所测的前倾角值和测量时间.结果 Photoshop法测得股骨前倾角为（17.0±4.2）°,三维空间测得股骨颈前倾角为（17.0±4.2）°（P＞0.05）;Photoshop法测量所需时间为（1 231.5±152.8）s,三维空间法测量所需时间为（590.0 ±37.2）s （P ＜0.01）.结论 三维空间法和传统Photoshop法测量股骨颈前倾角均能得到精确的前倾角值,但三维空间法可大大缩短测量时,提高测量效率.

Objective To investigate the evaluation of femoral neck anteversion using the digital three-dimensional model induced determination method.Methods Ten healthy volunteers,including five men and five women,aged 18-60 years （mean,43 years） were recruited.Bilateral femur CT scan was taken and processed with Mimics 17.0 software to build the three-dimensional model of the femur.Traditional Photoshop and three-dimensional reconstruction techniques were separately applied to determine the femoral neck anteversion.Anteversion angle and measurement time determined with the two methods were compared.Results Anteversion angle was （17.0 ± 4.2） ° based on the Photoshop method and was （17.0 ± 4.2） ° based on the three-dimensional method （P 〉 0.05）.Measuring time was （1,231.5 ± 152.8） sec with the Photoshop method and （590.0 ± 37.2） sec with the three-dimensional method （P 〈 0.01）.Conclusion Both methods provide accurate measuring of the femoral neck anteversion,but three-dimensional measurement spends far less time resulting in improved measure efficiency.