运动员膝关节在体运动检测系统的建立  

Construction of an in vivo motion evaluation system for the knee joint of athletes

作　　者：宋军[1] 李凭跃[2] 游辅宇 孔祥雪 肖菊姣 李鉴轶 

机构地区：[1]南方医科大学体育部,广州510515 [2]广州军区广州总医院全军创伤骨科中心 [3]解剖学教研室、广东省医学生物力学重点实验室

出　　处：《中华创伤骨科杂志》2013年第8期689-692,共4页Chinese Journal of Orthopaedic Trauma

基　　金：广尔省自然科学基金（S2011040003604.S2011010004179）;广东省省部产学研基金（20108090400425.20098090300279）;广东省科学技术厅基金（20118032200004）;广州市科技计划项目（201IJ4300108.1）

摘　　要：【摘要】目的探讨利月】2D／3D图像配准技术建立运动员膝关节在体运动检测系统的可行性。方法采集1名健康成年志愿者（男性，37岁）左侧膝关节的CT影像，进行三维重建获得骨结构的三维模型。取忠愿并保持约30。屈曲的2张x线片，在3DsMax7软件系统中构建虚拟x线系统，采用2D／3D图像配准技术重现膝关节的位置，将CT数据中胫骨作为配准基点并利用逆向工程技术计算摄X线片时膝关侮的相对运动。结果经2D／3D图像配准可还原膝关节的三维空间位置。逆向工程技术计算结果娃示：Lj采集CT数据时的位置相比，摄x线片时左侧股骨下段相对位移x轴为0．0mm，Y轴为5．20mm,Z轴为2．05mm；相对角度X轴为26．67°，Y轴为-0．97°，Z轴为-15．14°，结论利用2D／3D网像配准技术町实现膝关节的在体运动评价，但其配准效率尚需进一步研究：Objective To construtt an in z,ivo motion evaluation system tier the knee joint of athletes using 21）/31） registration. Methods CT data of the left knee from a male 37-year-old healthy aduh w^hmteer were collected tor 3D reconstruction of computer model of the knee joint. Two orthogonal images of the knee at a 30~ flexion angle were captored using 2 C-arm fluoroscopic machines that were perpendicular Io each other. A virtual fluort^scopy was then created in software 31）s Max for reconstruction of the relative po- sitions ~f the 2 orthogonal images. The 3D computer nmdels of the left femur and tibia were then introduced into the virttml fluoroscopy respet＇tively before they were projected onto the orthogonal images by 2 virtual cameras. The 3D pnsilinns of the knee joint were detennlned by nmtching the projections of the knee model to the orthogonal inmges of the knee. After the tibia in the CT data was taken as the base position for registration, the relatively displacements and angles of the femur were calculated with the reverse engineering technique. Results After 2I）/3D registration, the 3D positions of the knee joint were registered. Compared with the CT scan positinns, the relative displacements of the left femur were 0.01 mm at the X axis, 5.20 mm at the Y axis and 2.05 mm at the Z axis; the relative angles were 26.67° at the X axis, - 0. 97° at the Y axis and - 15. 14° at the Z axis. Conclusions 2D/3D registration can perform the in vivo motion evaluation of the knee joint for the athletes. However, the efficiency of 2D/3D registration needs further research. [

关 键 词：膝关节 运动试验 图像处理 计算机辅助 运动员 

分 类 号：R87[医药卫生—运动医学]