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相关概念视频

Relative Motion Analysis using Rotating Axes01:25

Relative Motion Analysis using Rotating Axes

533
Consider a component AB undergoing a linear motion. Along with a linear motion, point B also rotates around point A. To comprehend this complex movement, position vectors for both points A and B are established using a stationary reference frame.
However, to express the relative position of point B relative to point A, an additional frame of reference, denoted as x'y', is necessary. This additional frame not only translates but also rotates relative to the fixed frame, making it...
533

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相关实验视频

Updated: Sep 11, 2025

In Vivo Quantification of Hip Arthrokinematics during Dynamic Weight-bearing Activities using Dual Fluoroscopy
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使用运动捕捉评估放射性脊骨皮层对齐参数.

Nicola Büttiker1, David Koch2, Annegret Mündermann3

  • 1Department of Spine Surgery, University Hospital Basel, Basel, Switzerland; Institute for Biomechanics, ETH Zurich, Zurich, Switzerland.

Journal of biomechanics
|August 12, 2025
PubMed
概括

这项研究开发了一种方法,可以将运动捕捉的脊椎皮层对齐与放射学对齐. 结果显示显著的偏移,表明在使用运动捕捉用于腰椎脊柱狭窄症 (LSS) 评估时需要进行校正.

关键词:
腰椎脊柱狭窄症 腰椎脊柱狭窄症动作捕捉 运动捕捉补偿纠正的补偿纠正放射学 放射学 放射学 放射学脊皮皮层的对齐情况

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Biomechanical Changes Related to Low Back Pain: An Innovative Tool for Movement Pattern Assessment and Treatment Evaluation in Rehabilitation
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科学领域:

  • 生物力学 生物力学
  • 整形外科 整形外科 整形外科
  • 医疗成像医学成像

背景情况:

  • 放射性成像是脊髓皮层对齐的标准,但由于补偿策略,可能不会反映腰椎缩 (LSS) 的症状严重程度.
  • 动态评估脊骨皮层对齐对于了解LSS患者的功能至关重要.

研究的目的:

  • 开发和验证一种方法来对准从运动捕捉与放射性定义获得的静态脊椎皮层对齐参数.
  • 为了评估运动捕捉和EOSX光学之间的姿势一致性和角度偏差.

主要方法:

  • 27名LSS患者同时接受了EOS放射和动作捕捉分析,使用标记在相同的解剖学里程碑上.
  • 偏移角度被计算出来,以使运动捕捉数据与放射性参数保持一致.
  • 使用布兰德-阿尔特曼分析和三角分析来评估姿势一致性和角度偏差.

主要成果:

  • 在射线图和运动捕捉参数之间观察到显著差异,特别是十字斜率的平均偏移为31.1°.
  • 平均垂直ASIS-PSIS距离为-3.3毫米,平均水平SACR-C7距离为4.9毫米.
  • 最大角偏差达到5.9°的十字斜率和3.7°的脊柱倾斜.

结论:

  • 较大的偏移范围需要进行个别校正,以使用运动捕捉与放射学相比,更准确地对准脊椎皮层.
  • 该方法能够密切地复制EOS姿势,这表明该方法有可能在LSS患者中进行动态脊骨骨对齐评估.