人体关节活动度测量系统  

Measurement system for human joint range of motion

作　　者：胡超[1] 葛云[1] 陈颖[1] 

机构地区：[1]南京大学电子科学与工程学院,江苏南京210023

出　　处：《中国医学物理学杂志》2016年第1期34-38,共5页Chinese Journal of Medical Physics

基　　金：国家自然科学基金(81371638);中央高校基本科研业务费项目(1106021034);江苏省自然科学基金(BE2012158;BK2011393;BY2012186)

摘　　要：关节活动度是康复学中鉴定肢体伤残等级和评定关节康复程度的一项重要指标。目前常用的测量方法有通用量角器、照相法和X光,但这些方法在精度、稳定性和实时性方面都无法满足临床需要。本文提出了将光学定位设备NDI Polaris Spectra应用于人体关节活动度的测量,从而提高精确度、可重复性和实时性。本方法首先将反光小球固定在人体的骨性标志点上,然后利用NDI Polaris Spectra追踪反光小球的位置。NDI Polaris Spectra会将反光小球的三维坐标数据反馈给计算机,根据这些反光小球的三维坐标数据使用最小二乘法拟合出肢体运动的轨迹和轴心,从而计算出关节运动的角度。该方法测量结果的精度可以达到0.5°,标准差不超过0.02°,精度和稳定性都优于现有方法,足以满足临床需要。Joint range of motion （ROM） is an important indicator of rehabilitation to determine the physical disability grade and assess the joint rehabilitation. The most common measurement methods are universal protractor, photography and X-ray. However, the accuracy, stability and real-time of these methods are unable to meet the clinical needs. In this paper, an optical positioning equipment named NDI Polaris Spectra was proposed to measure the human ROM, improving the accuracy, repeatability and real-time. Passive balls were firstly fixed on the bone marker points of human body. And NDI Polaris Spectra was applied to track the positions of passive balls. The three-dimensional coordinates of passive balls were inputted into computer by NDI Polaris Spectra. Based on the three-dimensional coordinates, the physical movement and axis were simulated by least-square method to calculate the joint ROM. The measurement accuracy of proposed method reached 0.5°; the standard deviation was no more than 0.02°. The accuracy and stability of the proposed method are better than those of existing methods, meeting the clinical needs.

关 键 词：关节活动度 最小二乘法 NDI POLARIS SPECTRA 

分 类 号：R496[医药卫生—康复医学]