Defining and evaluating wrapping surfaces for MRI-derived spinal muscle paths.
Defining and evaluating wrapping surfaces for MRI-derived spinal muscle paths.
复制标题
定义和评估 MRI 衍生的脊髓肌肉路径的包裹表面。
DOI：
10.1016/j.jbiomech.2008.02.027
复制
发表时间：
2008
影响因子：
2.4
通讯作者：
D. C. Lin
中科院分区：
文献类型：
--
作者：
A. Vasavada;Richard A. Lasher;Travis E Meyer;D. C. Lin
在生物力学模型中，肌肉路径可以通过将路径包裹在几何对象周围来近似;然而，用于选择和评估包裹表面参数的过程没有很好地定义，特别是对于脊柱肌肉。在这项研究中，我们定义了客观的方法来选择的形状，方向，大小和位置的包装表面和评估的包装表面使用的误差度量的基础上的距离建模的肌肉路径和质心路径从磁共振成像（MRI）。我们将这些方法和误差度量应用于颈部肌肉组织的模型，其中我们的具体目标是（1）优化每个肌肉放置单个包裹表面的椎骨水平;以及（2）定义中性姿势中的包裹表面参数并在其他姿势中对其进行评估。提供了胸锁乳突肌和头半棘肌的详细结果。对于胸锁乳突肌，包裹表面放置的水平没有显著影响建模路径和质心路径之间的误差;使用从中性姿势定义的包裹表面相比，除了对侧旋转的所有姿势中的直线，改善了肌肉路径的表示。对于头半棘肌，与其他水平相比，放置在C3或C4处的包裹表面导致较低的误差;并且使用包裹表面显著改善了所有姿势中的肌肉路径表示。这些方法将用于改进生物力学模型中肌肉长度、力臂和力矩产生能力的估计。
Muscle paths can be approximated in biomechanical models by wrapping the path around geometric objects; however, the process for selecting and evaluating wrapping surface parameters is not well defined, especially for spinal muscles. In this study, we defined objective methods to select the shape, orientation, size and location of wrapping surfaces and evaluated the wrapping surfaces using an error metric based on the distance between the modeled muscle path and the centroid path from magnetic resonance imaging (MRI). We applied these methods and the error metric to a model of the neck musculature, where our specific goals were (1) to optimize the vertebral level at which to place a single wrapping surface per muscle; and (2) to define wrapping surface parameters in the neutral posture and evaluate them in other postures. Detailed results are provided for the sternocleidomastoid and the semispinalis capitis muscles. For the sternocleidomastoid, the level where the wrapping surface was placed did not significantly affect the error between the modeled path and the centroid path; use of wrapping surfaces defined from the neutral posture improved the representation of the muscle path compared to a straight line in all postures except contralateral rotation. For the semispinalis capitis, wrapping surfaces placed at C3 or C4 resulted in lower error compared to other levels; and the use of wrapping surfaces significantly improved the muscle path representation in all postures. These methods will be used to improve the estimates of muscle length, moment arm and moment-generating capacity in biomechanical models.
DOI：
10.1002/1097-0150(2000)5:2
发表时间：
2000-01-01
期刊：
Computer aided surgery : official journal of the International Society for Computer Aided Surgery
影响因子：
--
作者：
Arnold, A S;Salinas, S;Delp, S L
通讯作者：
Delp, S L