基于2D/3D配准技术的正常膝关节运动还原在体稳定性参数研究  

Evaluation on parameters of normal knee ligaments during weight-bearing flexion after motion analysis with the 2D/3D image registration technology

作　　者：李凭跃[1] 尹庆水[1] 黄华扬[1] 沈洪园[1] 王庆[1] 王泽锦[1] 李鉴轶[2] 

机构地区：[1]广州军区广州总医院全军创伤骨科中心,广州510010 [2]南方医科大学广东省生物力学重点实验室,广州510515

出　　处：《中国临床解剖学杂志》2010年第5期571-574,共4页Chinese Journal of Clinical Anatomy

基　　金：国家自然科学基金(30600302)

摘　　要：目的应用2D/3D图像配准技术进行运动还原以获得正常膝关节韧带的在体稳定性参数。方法在生理负重下利用两台C型臂X线机采集8名志愿者健、膝关节屈曲0°、15°、30°、60°和90°时的两幅相互垂直的X线影像(2D),与由CT重建的三维图像在虚拟X线投射系统进行2D/3D图像配准,还原膝关节不同角度时的股骨和胫骨相对3D位置关系,并通过韧带止点还原的方法对ACL、PCL、MCL、LCL进行韧带长度分析。结果随屈曲角度的增大,ACL长度逐渐缩短,从0(°27.73±1.34)mm至90(°23.34±1.48)mm;PCL长度逐渐增加,从0(°26.5±1.65)mm至90(°33.80±1.97)mm;MCL长度逐渐减小,从0°(38.17±1.40)mm至90°时(35.98±1.50)mm。LCL长度同样逐渐减小,从0°(52.56±1.64)mm至90°(50.22±1.41)mm。差异均有统计学意义(P<0.05)。结论基于2D/3D图像配准技术可获得正常膝关节生理屈曲过程中韧带长度的变化规律。Objective To get the length parameters in vivo of ligaments of healthy knees of Chinese during weight-bearing flexion after motion analysis with the 2D/3D registration technique.Methods 2 orthogonal X ray images of knees were got under weight-bearing flexion 0°,15°,30°,60°,and 90°in 8 healthy knees of volunteers.These orthogonal images were then imported into virtual fluoroscopic registration system and registered with the three-dimensional models which were reconstructed from CT data with the 2D/3D image registration technology.After 2D/3D image registration,the three-dimensional motions of knees under weight-bearing were showed.Through the bone insertion of ACL/PCL,MCL/LCL,the length parameters of ligaments in vivo were analyzed.Results With the flexion angle increased,ACL length gradually shortened,from（27.73±1.34）mm at 0°to（23.34±1.48）mm at 90°s;PCL length increased gradually,from（26.5±1.65） mm at 0°to（33.80±1.97）mm at 90°;MCL length decreased gradually,From（38.17±1.40）mm at 0°to （35.98±1.50）mm at 90°;LCL length gradually reduced,from（52.56±1.64）mm at 0°to（50.22±1.41）mm at 90°.Differences have statistical significance（P〈0.05）.Conclusions The in vivo ligaments parameters of the healthy knee at different flexion angle can be got through the 2D/3D image registration technique.

关 键 词：2D/3D图像配准 膝关节 在体 韧带 

分 类 号：R318.01[医药卫生—生物医学工程]