无接触雷达测试对老化中的跌倒风险进行评估
Daniel Copeland1, Xiang Zhang1, Evan Linton2
1Center for Clinical and Translational Research at MIT, Cambridge, MA, USA.
Gait & posture
|February 13, 2026
概括
频率调制连续波 (FMCW) 雷达可以自主监测单腿站立测试 (OLST) 并评估老年人的平衡. 这种无接触技术准确地检测测试过渡并测量不稳定性,显示了家庭落风险监测的前景.
科学领域:
- 生物医学工程 生物医学工程
- 老年学是一门学科.
- 信号处理 信号处理
背景情况:
- 跌倒是老年人受伤和死亡的主要原因,需要改进评估跌倒风险的方法.
- 目前的跌倒风险评估,如一腿站立测试 (OLST),通常受到监督,不频繁,可能会错过稳定性的关键变化.
研究的目的:
- 评估一个维护隐私的频率调制连续波 (FMCW) 雷达系统,用于自主监控OLST.
- 评估雷达系统在OLST期间测量姿势不稳定的能力,并将其与黄金标准的运动捕捉和强力板进行比较.
主要方法:
- 一项涉及32名健康成年人 (年轻和年长年龄组) 的横截面研究,进行了短期和长期的OLST试验.
- 使用FMCW雷达,力板和运动捕获 (MOCAP) 进行同步数据收集.
- 在雷达数据上训练CNN-LSTM-Attention模型来分类OLST阶段并评估稳定性指标.
主要成果:
- 雷达系统在检测OLST过渡 (Foot-Up和Foot-Down事件) 中获得了高精度 (94.0-96.9%).
- 在稳定阶段的雷达衍生多普勒波动指标与OLST持续时间有很强的相关性,并与力板和MOCAP措施保持一致.
- 雷达功能在短期试验中有效区分研究队列,表明对平衡变化的敏感性.
结论:
- FMCW雷达技术准确地检测OLST过渡并量化姿势摇摆,提供有关神经肌肉控制和跌倒风险的见解.
- 本研究建立了对老年人非接触式基于雷达的平衡评估的概念验证.
- 这些发现支持进一步的临床验证,以潜在地用于在家中持续监测平衡和跌倒风险.
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