Shear wave speed recovery using moving interference patterns obtained in sonoelastography experiments
Shear wave speed recovery using moving interference patterns obtained in sonoelastography experiments
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DOI：
10.1121/1.2534717
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发表时间：
2007-04-01
影响因子：
2.4
通讯作者：
Wu, Zhe
中科院分区：
文献类型：
--
作者：
McLaughlin, Joyce;Renzi, Daniel;Wu, Zhe
创建了两个新的实验，使用超声弹性成像来表征软组织的弹性。在这两个实验中，GE LOGIC 700超声机上显示的频谱方差图像显示了以剪切波速度的很小一部分传播的移动干涉图案。本文的目标是设计和测试算法来计算速度的移动干涉图案使用这些相同的图案的到达时间。利用几何光学展开得到运动干涉图样到达时间与运动干涉图样速度、剪切波速度之间的Eikonal方程。一个互相关的过程中找到的到达时间，和一个逆Eikonal解算器称为水平曲线法计算的干涉图案的速度。该算法的数据进行了测试，从一个幻影实验在罗切斯特大学中心的生物医学超声。(c)2007年，美国声学学会。
Two new experiments were created to characterize the elasticity of soft tissue using sonoelastography. In both experiments the spectral variance image displayed on a GE LOGIC 700 ultrasound machine shows a moving interference pattern that travels at a very small fraction of the shear wave speed. The goal of this paper is to devise and test algorithms to calculate the speed of the moving interference pattern using the arrival times of these same patterns. A geometric optics expansion is used to obtain Eikonal equations relating the moving interference pattern arrival times to the moving interference pattern speed and then to the shear wave speed. A cross-correlation procedure is employed to find the arrival times; and an inverse Eikonal solver called the level curve method computes the speed of the interference pattern. The algorithm is tested on data from a phantom experiment performed at the University of Rochester Center for Biomedical Ultrasound. (c) 2007 Acoustical Society of America.