基于波形相似性评估的惯性测量单位的验证与用于步态动力学分析的光谱系统对比

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Laura Blanco-Coloma¹, Lucía García-González¹, Isabel Sinovas-Alonso¹

¹Biomechanics and Technical Aids Unit, National Hospital for Paraplegics, Toledo, Spain.

Frontiers in bioengineering and biotechnology

|August 28, 2024

概括

这项研究验证了惯性测量单位 (IMU) 的准确步态分析,这对于临床康复至关重要. 这些发现证实IMU可以可靠地测量关节运动,最大限度地减少治疗评估中的系统诱导错误.

科学领域:

生物力学和运动科学生物力学和运动科学
康复工程康复工程
临床测量临床测量

背景情况:

准确的步态分析对于临床决策和评估康复进展至关重要.
惯性测量单元 (IMU) 为实验室外的步态动力学提供了便携式解决方案,但容易出现漂移和偏移等错误.
经过验证的协议是必要的,以确保基于IMU的步态测量的可靠性,并区分真正的治疗效果和系统工件.

研究的目的:

通过使用IMU与摄像度参考系统对比,验证行走动力学评估的准确性.
建立一个可靠的仪器仪表和记录协议,以IMU为基础的步态分析在临床环境.
量化IMU和摄影测量系统之间主要下肢关节运动的测量误差和波形相似性.

主要方法:

使用32名健康受试者创建了一个步行数据库,同时从IMU和摄影计量系统同步获取数据.
验证涉及皮尔森相关性,信号偏移的评估,运动差异范围 (∆ROM),根平均平方误差 (RMSE) 和多重相关性的解释系数 (CMC_P).
在应用偏移校正 (CMC_Poff) 以评估波形相似性后,重新评估了CMC_P.

主要成果:

在部,膝盖和脚运动中观察到强烈的相关性 (r > 0.75).
∆ROM值低于6°,RMSE值低于10°,这表明相对于临床重要性的差异很小.
虽然最初的CMC_P值很高,表明相似性,但只有部曲/延伸,部引/绑架和膝盖曲/延伸在偏移校正后满足了相似性标准 (CMC_Poff).

结论:

开发的协议和IMU系统在评估关键步态动力学方面表现出良好的准确性,可与黄金标准的摄影仪表相提并论.
偏移校正对于通过IMU测量的步行动力学模式具有很高的相似性至关重要,特别是在部和脚的斜腰平面运动中.
经过验证的IMU协议提高了康复过程中步态分析的可靠性,使患者进展与系统错误的差异化更为准确.

关键词:

的可行性和可行性.惯性测量单位 (IMU) 是指惯性测量单位.解释程序的多重相关系数 (CMCP).摄影计量 (摄影计量) 是一种摄影计量技术.可以重复的可重复性.三维 (3D) 动态步态数据数据波形相似性评估波形相似性的评估.

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