在典型发育的儿童中比较标记器和无标记器衍生的下半身三维步态动力学
Henrike Greaves1,2, Antonio Eleuteri3, Gabor J Barton1
1Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool L3 3AF, UK.
Sensors (Basel, Switzerland)
|July 30, 2025
概括
在儿童3D步态分析中,无标记运动捕捉与基于标记的系统相比显示出差异. 需要进一步的研究来了解这些偏差在临床使用之前.
科学领域:
- 生物力学 生物力学
- 步态分析 步态分析
- 运动捕捉技术的技术.
背景情况:
- 基于标记器的运动捕捉是3D步态分析的黄金标准,但耗时且可能会引起儿童的焦虑.
- 无标记摄像头系统为传统的基于标记的方法提供了潜在的替代方案.
- 这项研究旨在比较儿童的基于标记物和无标记物系统之间的3D下肢步行动力学.
研究的目的:
- 为了比较儿童的三维 (3D) 下肢步行动力学,使用基于标记器的与无标记器的运动捕捉.
- 评估两个运动捕捉系统之间的可行性和差异,用于儿科步行分析.
主要方法:
- 10名典型发育的儿童 (6至13岁) 通过基于标记器和没有标记器的系统进行了步态分析.
- 通过使用Qualisys Oqus (基于标记器) 和Qualisys Miqus (无标记器) 系统,以85Hz收集同步步步态度数据.
- 用通用添加混合模型和平方根平均差异 (RMSD) 来分析系统比较.
主要成果:
- 在大多数关节角度和运动平面上,在基于标记器和没有标记器的系统之间发现了显著的差异.
- 这些差异随着时间和年龄在步态周期的变化而变化.
- 系统之间的平方根平均差异 (RMSD) 与之前的研究相似.
结论:
- 虽然动力学概况有所不同,但RMSD值表明系统之间的潜在可比性.
- 差异可能源于替代模型定义和动态交叉声.
- 需要更大的样本大小来澄清成熟对无标记追踪的影响,并验证其临床应用.
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