基于视频跟踪的前交叉韧带重建导航及仿真评估系统研究  

A Video-based Anterior Cruciate Ligament Reconstruction Navigation and Evaluation System

作　　者：胡岩[1] 王田苗[1] 王君臣[1] 孙磊[2] 胡磊[1] 许永刚[1] 冯华[2] 

机构地区：[1]北京航空航天大学机器人所,北京100083 [2]北京积水潭医院创伤骨科研究所,北京100035

出　　处：《中国生物医学工程学报》2009年第2期231-237,共7页Chinese Journal of Biomedical Engineering

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)

摘　　要：植入点位置的确定以及重建后是否满足等距性,对于前交叉韧带(ACL)的重建是至关重要的。针对ACL重建入点定位困难以及缺少术后评估等问题,借助于视频跟踪相机,实现了一种基于膝关节侧位X光片的股骨四分格和胫骨46%方法的ACL重建导航及仿真评估系统,并分别介绍了视频跟踪、空间映射及C臂标定、图像融合、图像校正、曲面重建算法等关键技术的实现。利用该系统进行了8例模型骨的实验,并对采集到的特征点进行了精度验证,入点定位误差最大为2.59 mm,平均为1.59 mm。实验结果表明,该系统利用两幅X光图像可以完成ACL重建手术规划,入点定位误差可以基本满足临床应用要求,初步验证了该方法的可行性。In the anterior cruciate ligament （ACL） reconstruction operation, it is very important that the insertion points are ensured and the reconstructed ACL satisfies the isometric characteristic. Recurring to the video track camera, a navigation system of simulation evaluation and insertion points planning was implemented based on quadrant of femur and ＂46%＂ of tibia on the lateral X-ray image of knee joint. Then the key technologies such as image correction, C-arm calibration, video tracking, reconstructing surfaces algorithm, and image fusion were introduced. With this system, 8 plastics was implemented and the accuracy of the characteristic points was validated. The maximal error of the insertion point was 2.59 mm with the mean 1.59 mm. The feasibility of this method was preliminarily verified by implementing ACL reconstruction planning using two X-ray images. The positioning error of insertion point could meet the requirement of the clinical application.

关 键 词：计算机辅助导航 ACL重建 视频跟踪 四分格规划 仿真评估 

分 类 号：R318.08[医药卫生—生物医学工程]