全膝关节置换手术导引中股骨头中心定位精度的实验研究

Experimental Research for Position Accuracy of Caput Femoris Center in Total Knee Replacement Navigation Surgery

应用准确、快速的方法确定股骨头中心是全膝关节置换手术导引中的一项关键技术。我们提出了一种确定股骨头中心的算法,该算法的核心是将问题抽象成已知球面上若干点求解球心的几何模型。通过实验验证,该方法正确可行,其精度满足导引手术的要求。

Finding the position of caput femoris center by exact and fast method is a key technique in total knee replacement navigation surgery. A method for finding the position of caput femoris center is described in this paper. The main idea is abstracting this problem to a geometrical model in which the center of a sphere can be easily worked out with a few known spherical points. Experiments show that the method is feasible and the precision satisfies the requirements of navigation surgery.