In-Plane Anisotropy Method for the Characterization of the Elastic Properties of Anisotropic Materia

来源 :2015两岸超声技术与医学研讨会 | 被引量 : 0次 | 上传用户:tjkjkfzx
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Background, Motivation and Objective Currently, the mechanical properties of anisotropic tissues such as skeletal muscle are evaluated by assuming the media to be transversely isotropic (TI) and estimating the shear wave group velocity (cg) as a function of the angle between the tissue fibers and the direction of shear wave propagation in the range -180° to +180°. Here, we propose a simplified method, called In-Plane Anisotropy (IPA), to estimate the TI shear moduli by measuring the shear waves directed at different angles with respect to the main axis of the muscle fibers, defined as 0°, in a single B-mode imaging plane. By measuring cg at angles centered around 0°, we can fit a TI model to these values to estimate the complete TI behavior. To investigate the IPA method, we used a finite element model (FEM) of the shear wave propagation in an elastic TI media, and we evaluated the properties of a TI phantom.
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