股骨设计基轴线──股骨轴线在人工髋关节CAD中的一种实用描述

DESIGN BASE AXIS OF FEMUR──A PRACTICAL REFERENCE FOR CAD OF ARTIFICIAL HIP JOINTS

本文提出“股骨设计基轴线”的概念。给出了根据股骨各ＣＴ截面的内轮廓形心在过ＣＴ轴的两个相互垂直的投影面内的拟合直线确定股骨设计基轴线的方法。为基于ＣＴ片的人工髋关节的ＣＡＤ建立了一个实用的几何设计基准。

A new concept, design base axis of femur, is presented in this paper. The design base axis of femur,serving as the reference for the CAD of artificial hip jionts, is defined as the analogue line of the inner outline shape centers of the femur CT sections along the femur axis. The design base axis of femur is determined through the following procedures : First, the varying of the X and Y coordinates of the shape centers of the selected CT sections along the CT axis is respectively analogued; Then,the femur design base is determined according to the rules and relations of projection.