基于运动学波形数据的髋关节置换术患者特征提取与步态分类

IF 0.8 Q4 HEALTH CARE SCIENCES & SERVICES
Carlo Dindorf, W. Teufl, B. Taetz, S. Becker, G. Bleser, M. Fröhlich
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引用次数: 5

摘要

摘要:研究目的:在不依赖步态特定假设或先验知识的情况下,找出哪些参数对全髋关节置换术后患者步态不对称的描述最为重要。材料与方法:采用光学运动捕捉系统记录22例THA术后患者的步态。将标记点位置、速度、加速度以及关节和节段角度的波形数据作为初始特征。选择随机森林(RF)和最小冗余最大相关(mRMR)算法进行特征选择。并与不同降维方法的结果进行了比较。结果:髋关节矢状面运动、膝关节矢状面和前、后髂上棘标记物位置数据、腓骨近端标记物加速度数据对分类非常重要(准确率:91.09%)。与降维相比,特征选择可以获得更好的结果。结论:所提出的方法可以通过波形数据识别和单独处理康复过程中的异常步态模式。结果表明,位置和加速度数据也为该任务提供了重要的信息。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Feature extraction and gait classification in hip replacement patients on the basis of kinematic waveform data
Abstract Study aim: To find out, without relying on gait-specific assumptions or prior knowledge, which parameters are most important for the description of asymmetrical gait in patients after total hip arthroplasty (THA). Material and methods: The gait of 22 patients after THA was recorded using an optical motion capture system. The waveform data of the marker positions, velocities, and accelerations, as well as joint and segment angles, were used as initial features. The random forest (RF) and minimum-redundancy maximum-relevance (mRMR) algorithms were chosen for feature selection. The results were compared with those obtained from the use of different dimensionality reduction methods. Results: Hip movement in the sagittal plane, knee kinematics in the frontal and sagittal planes, marker position data of the anterior and posterior superior iliac spine, and acceleration data for markers placed at the proximal end of the fibula are highly important for classification (accuracy: 91.09%). With feature selection, better results were obtained compared to dimensionality reduction. Conclusion: The proposed approaches can be used to identify and individually address abnormal gait patterns during the rehabilitation process via waveform data. The results indicate that position and acceleration data also provide significant information for this task.
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来源期刊
Biomedical Human Kinetics
Biomedical Human Kinetics HEALTH CARE SCIENCES & SERVICES-
CiteScore
1.50
自引率
12.50%
发文量
0
审稿时长
15 weeks
期刊介绍: The leading idea is the health-directed quality of life. The journal thus covers many biomedical areas related to physical activity, e.g. physiology, biochemistry, biomechanics, anthropology, medical issues associated with physical activities, physical and motor development, psychological and sociological issues associated with physical activities, rehabilitation, health-related sport issues and fitness, etc.
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