股骨上段的三维重建

人体髋关节在发生严重病变、骨折等情况时，进行人工髋关节的置换是一条可行的途径。股骨的三维重建为髋关节假体的优化设计提供了依据。计算机断层扫描技术的发展，使得以无损伤技术获得病人关节骨断层的几何形状成为可能。将不同层面上的二维图像数据按照断层的空间位置依次排列，就可以形象地显示病人关节的三维图像。本文以人体髋关节为例，从ＣＴ片的图像处理、轮廓数据筛选、三维网格面建立以及股骨实体化等几方面介绍了股骨上端的三维重建过程。

THREE DIMENSIONAL RECONSTRUCTION FOR PROXIMAL FEMUR

Artificial joint replacement is a feasible approach to serious arthritic diseases. The 3D reconstruction for femur provides scientific basis for the prostheses optimal design. Development of Computed Tomograph makes it possible to obtain the geometry shapes of bone cross sections nondestructively. When the cross sections are arranged in sequence along the bone axis, the 3D image of bone can be developed. By taking the femur for example this paper presents a new 3D reconstruction process of human bone systemly including CT image processing, outline points screening, 3D mesh surface building and image rendering.