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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

Three-Dimensional Finger Motion Tracking during Needling: A Solution for the Kinematic Analysis of Acupuncture Manipulation
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基于波形的头分析,使用2D视频的无标记器追踪算法: sinus-idality和节奏性的评估.

Jung Hwan Shin1, Seungmin Lee1, Kyung Ah Woo1

  • 1Department of Neurology, Seoul National University Hospital, Seoul National University, Seoul, South Korea.

Movement disorders : official journal of the Movement Disorder Society
|August 15, 2025
PubMed
概括

这项研究引入了一种新的视频分析方法,以客观地测量震的节奏性和鼻性. 这种方法有效地区分了基本震与宫 dystonia,提供了一个新的诊断工具.

关键词:
迪斯托尼亚 (Dystonia) 是一种精神疾病.基本震是一种基本的震.视频 视频 视频 视频 视频

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Dynamic Digital Biomarkers of Motor and Cognitive Function in Parkinson's Disease
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Frame-by-Frame Video Analysis of Idiosyncratic Reach-to-Grasp Movements in Humans
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相关实验视频

Last Updated: Sep 11, 2025

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08:27

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科学领域:

  • 神经学 神经学
  • 生物医学工程 生物医学工程
  • 信号处理 信号处理

背景情况:

  • 由于主观的临床评估和重叠的特征,震的分类具有挑战性.
  • 需要对的特征进行客观测量,例如节律性和侧腔性.

研究的目的:

  • 引入一种新的基于视频的波形分析,用于客观地评估震.
  • 用定义的指数量化震的节奏性和侧面性.
  • 为了验证该方法,并区分基本震 (ET) 和宫 dystonia (CD).

主要方法:

  • 开发的基于视频的指数:高峰间隔变化系数 (CVIPI) 用于节律性和斜率-折叠比率用于 sinus-idality.
  • 在13名CD患者的陀螺仪测量中得到验证.
  • 应用于28名CD和22名ET患者的档案视频.

主要成果:

  • 基于视频的指数与陀螺仪数据显示出很好的一致性 (频率为ICC=0.99,阴侧度为ICC=0.93).
  • 节奏性指数显示出良好的可靠性 (ICC=0.86).
  • 与ET病例相比,CD病例表现出明显较低的节律性和侧腔性,形成不同的群体,CD的准确率为82.1%,ET的准确率为63.6%.

结论:

  • 基于视频的波形分析提供了一个客观的工具来评估震的节奏性和状性.
  • 该方法可以客观地描述综合征.
  • 鉴定出的明显的波形特征突出显示了ET和CD震中的变化.