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Movement Retraining using Real-time Feedback of Performance
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支持TinyML的可穿戴系统用于早期检测膝关节关节炎,使用组合步态分类
Madhavan Bharanidivya1, Samiappan Dhanalakshmi2
1Department of Electronics and Communication Engineering, SRM Institute of Science and Technology, Kattankulathur, Chennai, Tamilnadu, 603203, India.
Computers in biology and medicine
|December 7, 2025
概括
这项研究引入了一种双惰性测量单元 (IMU) 传感器系统,用于实时步态阶段分类,使用随机森林能够以97%的准确性早期检测膝关节骨关节炎 (KOA) 异常.
科学领域:
- 生物医学工程 生物医学工程
- 可穿戴技术可穿戴技术
- 医疗保健中的机器学习
背景情况:
- 步行分析通常使用惯性测量单元 (IMU) 传感器,因为它们的可移植性和实时功能.
- 现有的研究往往优先考虑分类准确性,而不是实际挑战,例如可穿戴系统中的传感器漂移.
- 早期发现膝关节关节炎 (KOA) 需要可靠的步态监测方法.
研究的目的:
- 开发和验证一种基于传感器的可穿戴系统,用于实时步态阶段分类.
- 为了确定与膝关节骨关节炎 (KOA) 相关的步态不规则.
- 为此应用评估机器学习分类器的性能.
主要方法:
- 使用双IMU传感器 (MPU9250) 放置在股骨和骨上,以100Hz收集数据.
- 使用min-max规范化和异常值排除来提取特征 (方向,角速度,加速) 的IMU数据处理.
- 训练和评估了八个机器学习分类器,专注于组合方法,并在TinyML-ready硬件上部署模型.
主要成果:
- 集合分类器表现出高性能,随机森林实现97%的准确性,梯度提升 (Gb) 和堆叠实现96%的准确性.
- 统计分析证实了随机森林的显著优势 (弗里德曼测试,p < 0.01).
- 该系统在资源有限的硬件上实现了可靠和高效的实时步态阶段分类.
结论:
- 拟议的双IMU系统为准确的步态监测和早期KOA检测提供了可行的,经济实惠的解决方案.
- 这项技术具有在线监控,临床康复和个性化移动性评估的巨大潜力.
- 使用可穿戴IMU的实时步行阶段分类可以有效地用于医疗诊断.
相关概念视频
01:09Functional Classification of Joints
Functional Classification of Joints
The functional classification of joints is determined by the amount of mobility between the adjacent bones. Joints are functionally classified as a synarthrosis or immobile joint, an amphiarthrosis or slightly moveable joint, or as a diarthrosis, a freely moveable joint. Fibrous and cartilaginous joints can be functionally classified as either synarthroses or amphiarthroses, whereas all synovial joints are classified as diarthroses.
Synarthrosis
An immobile...
The functional classification of joints is determined by the amount of mobility between the adjacent bones. Joints are functionally classified as a synarthrosis or immobile joint, an amphiarthrosis or slightly moveable joint, or as a diarthrosis, a freely moveable joint. Fibrous and cartilaginous joints can be functionally classified as either synarthroses or amphiarthroses, whereas all synovial joints are classified as diarthroses.
Synarthrosis
An immobile...
01:10Ankle Joint
The ankle is formed by the talocrural joint (crural = leg). It consists of the articulations between the talus bone of the foot and the distal ends of the tibia and fibula of the leg. The superior aspect of the talus bone is square-shaped and has three areas of articulation. The top of the talus articulates with the inferior tibia. This is the portion of the ankle joint that carries the body weight between the leg and foot. The sides of the talus are firmly held in position by the articulations...