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首页> 外文会议>BMEI 2012;International Conference on Biomedical Engineering and Informatics >An image-based method for quantification of masseter muscle deformation
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An image-based method for quantification of masseter muscle deformation

机译：基于图像的咬肌变形定量方法

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摘要

Current methods that evaluate the functions of masseter muscles (MM) are not suited to fully describing their functional roles. The aim of this study was to develop a method to quantify the deformations of MM in simulated mandibular movements for individual study. A normal adult male subject underwent magnetic resonance (MR) scans of the head at four mandibular positions: mandibular rest (M0), maximum intercuspation (M1), medium jaw-opened (M2), and maximum jaw-opened (M3) positions. The muscle models of the subject were reconstructed from the four sets of MR images, and the deformations of the MM in the three cases, i.e., from M0 to M1, from M0 to M2 and from M2 to M3, were quantified in terms of the displacements of region correspondences between the muscle models before and after the mandibular position changed. The functional activities along the entire body and at specific anatomic compartments of the subject-specific MM were quantified and visualized using the quantified deformation fields. The directions of the active and positive muscle tensions during the simulated mandibular movements were indicated by the resultant directions of the deformations, respectively. The proposed method revealed the anatomic architectural and biomechanical characteristics of the subject-specific MM appropriately and meaningfully in the simulated mandibular movements.
机译：当前评估咬肌（MM）功能的方法不适合完全描述其功能作用。这项研究的目的是为个体研究开发一种量化下颌运动模拟中的MM变形的方法。一名正常的成年男性受试者在四个下颌位置进行头部的磁共振（MR）扫描：下颌休息（M0），最大maximum锁（M1），中等张开（M2）和最大张开（M3）位置。从四组MR图像中重建对象的肌肉模型，并根据以下条件量化MM在三种情况下的变形，即从M0到M1，从M0到M2和从M2到M3。下颌位置改变前后肌肉模型之间区域对应关系的位移。使用量化的变形场量化并可视化对象特定MM整个身体和特定解剖部位的功能活动。在模拟的下颌运动过程中，主动和正向肌肉张力的方向分别由变形的合成方向指示。所提出的方法在模拟的下颌运动中适当且有意义地揭示了特定对象MM的解剖结构和生物力学特征。

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