论文部分内容阅读
背景:临床研究表明假体与股骨髓腔的匹配度决定假体的长期稳定性,以往股骨近端测量主要以正侧位X射线片为主,但存在较多误差。目的:研究股骨上段髓腔截面几何形态的统计规律。设计:重复测量观察。单位:上海交通大学医学院附属第九人民医院骨科。对象:选取无破损尸体股骨标本10个(上海第二医科大学解剖教研室提供)。方法:2000-01/03在上海第二医科大学附属第九人民医院骨科完成,以计算机图像处理的方法对股骨上段髓腔截面形态进行自动提取,并提出圆锥曲线拟合的参数化数学方法;同时采用人工方法对10例股骨上段髓腔截面的进行测量。主要观察指标:计算机和人工方法测量突出末端坐标和连接点坐标比较。结果:10个股骨标本均进入结果分析。计算机测量股骨上段髓腔截面突出末端坐标(X,Y)和连接点坐标(X,Y)与人工方法测量结果差异无显著性(P分别为0.9938,0.9969,0.9582,0.9606)。结论:计算机图像处理的方法对股骨上段髓腔截面形态进行自动提取测量法不仅减少了人为误差,且能以计算机自动完成,适合于大批量的形态计量。
BACKGROUND: Clinical studies show that the matching degree between the prosthesis and the femoral canal determines the long-term stability of the prosthesis. In the past, the measurement of the proximal femur mainly focused on the posterior X-ray film, but there were more errors. Objective: To study the statistical rules of the geometric shape of the medullary cavity in the upper femur. Design: Repeat measurement observation. Unit: Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine. PARTICIPANTS: Ten specimens of intact femur were selected (Department of Anatomy, Shanghai Second Medical University). METHODS: The method of computer image processing was used to automatically extract the medial section of medullary cavity of the femur from January 2000 to March 2003 at the Ninth People ’s Hospital of Shanghai Second Medical University. Parametric mathematics method of conic curve fitting was proposed. At the same time, 10 cases of upper femur section of medullary canal were measured by manual method. MAIN OUTCOME MEASURES: COMPARISON BETWEEN OUTSIDE COORDINATES AND CONNECTION POINT COORDINATES BY COMPUTER AND MANUAL METHODS. Results: Ten femoral specimens were included in the result analysis. There was no significant difference between the measurement results of the distal end coordinate (X, Y) and the connection point (X, Y) measured by computer and the manual method (P = 0.9938,0.9969,0.9582,0.9606 respectively). CONCLUSION: The method of computer image processing automatically measures the cross-sectional morphology of the medullary cavity in the upper femur, which not only reduces human error but also can be automatically completed by computer. It is suitable for high-volume morphometry.