Baghani Ali, Eskandari Hani, Salcudean Septimiu, Rohling Robert
Department of Electrical and Computer Engineering, University of British Columbia, Vancouver, BC, Canada.
IEEE Trans Ultrason Ferroelectr Freq Control. 2009 Jul;56(7):1405-18. doi: 10.1109/TUFFC.2009.1196.
This paper presents an experimental framework for the measurement of the viscoelastic properties of tissue-mimicking material. The novelty of the presented framework is in the use of longitudinal wave excitation and the study of the longitudinal wave patterns in finite media for the measurement of the viscoelastic properties. Ultrasound is used to track the longitudinal motions inside a test block. The viscoelastic parameters of the block are then estimated by 2 methods: a wavelength measurement method and a model fitting method. Connections are also made with shear elastography. The viscoelastic parameters are estimated for several homogeneous phantom blocks. The results from the new methods are compared with the conventional rheometry results.
本文提出了一种用于测量仿组织材料粘弹性特性的实验框架。所提出框架的新颖之处在于使用纵向波激励以及研究有限介质中的纵向波模式来测量粘弹性特性。利用超声波追踪测试块内部的纵向运动。然后通过两种方法估计该块体的粘弹性参数：波长测量法和模型拟合方法。还将其与剪切弹性成像进行了联系。对几个均匀的仿体块体估计了粘弹性参数。将新方法的结果与传统流变测量结果进行了比较。
