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基于MRI的骨肌结构和收缩过程中的应变的3D估计

Roberto A Pineda Guzman¹, Carly A Lockard¹, Xingyu Zhou^1,2,3

¹Carle Clinical Imaging Research Program, Stephens Family Clinical Research Institute, Carle Health, Urbana, IL, USA.

bioRxiv : the preprint server for biology

|August 6, 2025

概括

这项研究使用MRI量化了3D骨肌结构和收缩期间的应变. 它揭示了纤维长度,笔纹和曲率的变化,突出了新的生物力学研究的潜力.

科学领域:

生物力学生物力学
肌肉骨成像系统的成像
人体生理学人体生理学

背景情况:

了解骨肌肉的3D结构和收缩期间的应变对于评估健康和疾病中的机械功能至关重要.
像超声波这样的当前方法缺乏3D全肌量化,而扩散张力图像 (DTI) 轨道图像在收缩期间受到长时间扫描的限制.

研究的目的:

实施和验证DTI-tractography与图像注册方法,以估计在中度收缩期间前 (TA) 的3D全肌结构和应变.
为了研究肌肉结构和动态肌肉功能期间的应变之间的关系.

主要方法:

采用DTI-tractography结合图像注册技术来评估前肌 (TA) 的3D结构.
在20-40%的MVC收缩过程中测量了全肌筋应变,从而能够评估肌内结构-应变关系.

主要成果:

在收缩过程中观察到纤维通道长度的减少,钢笔角的增加和TA中纤维曲率的增加.
在肌肉区域和肌肉区域内识别了肌肉内菌株异质性,可能受区域肌肉结构的影响.

结论:

基于MRI的DTI-轨道图与图像注册为3D全肌结构和收缩期间应变估计提供了可行的方法.
这种方法为推进骨肌肉生物机械研究和了解肌肉功能提供了重要的新数据.

关键词:

这就是为什么MRI是MRI.骨架肌肉是一个骨肌肉.肌肉结构肌肉架构肌肉架构肌肉收缩肌肉收缩肌肉张力肌肉张力肌肉张力

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Magnetic Resonance Imaging

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Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...