一种无图像导航下ACL重建的等距规划方法  

An ACL reconstruction planning method based on isometry with image-free navigation

作　　者：胡岩[1] 王田苗[1] 胡磊[1] 王君臣[1] 

机构地区：[1]北京航空航天大学机器人所,北京100191

出　　处：《高技术通讯》2009年第8期844-849,共6页Chinese High Technology Letters

基　　金：国家杰出青年科学基金(60525314);国家科技支撑计划(2006BAI03A16);北京市科技计划(H060720050230)资助项目

摘　　要：针对膝关节前交叉韧带(ACL)移植位置不易确定的问题,采用光电跟踪技术,提出了一种基于等长规划的ACL无图像导航重建方法。首先根据韧带等距理论,设计了一种基于计算胫骨绕股骨运动过程中距离变化最小的点对的等距规划方法,然后分析了无图像导航系统的总体结构及关键技术,包括手术空间各对象的坐标转换、关节特征采集原则和表面重建方法,最后利用该方法进行了2例牛腿骨实验。结果表明,该规划方法合理有效,在股骨/胫骨的生长区域内的定位精度达1.45mm,能够满足临床手术要求。To assure the accuracy of implantation position and the protection of surgeons from X-ray radiation in anterior cruciate ligament （ACL） reconstruction, an ACL reconstruction planning method based on isometry and image-free navigation was presented and it was implemented with photoelectric tracking. Firstly, an isometric planning strategy was designed according to the isometric theory, which was based on computing the distance change between point-pairs during the tibia rotation around the femur. Then the configuration of the navigation system and the implementations of the key technologies including the coordinate transformation of the operation objects, and the anatomical feature-acquisition and bone surface reconstruction of the knee joint were analyzed respectively. And finally, the experiments on 2 legs of ox were implemented. The results showed that this method was reasonable and effective. The precision of position in anatomical area of femur/tibia was 1.45mm, which can satisfy the requirement of clinical surgery.

关 键 词：计算机辅助矫形外科(CAOS) 前交叉韧带(ACL)重建 等距 光电相机跟踪 无图像导航 

分 类 号：TN966[电子电信—信号与信息处理]