Shear wave speed recovery in sonoelastography using crawling wave data
Shear wave speed recovery in sonoelastography using crawling wave data
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DOI：
10.1121/1.3442575
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发表时间：
2010-07-01
影响因子：
2.4
通讯作者：
Thomas, Ashley
中科院分区：
文献类型：
--
作者：
Lin, Kui;McLaughlin, Joyce;Thomas, Ashley
爬行波实验，其中两个谐波源以不同但接近的频率振荡，是声弹性成像的发展，其允许传播剪切波干涉图案的实时成像。以前的爬行波速度被恢复，并用作剪切刚度的指标，然而，它是在本文中所示的爬行波速度图像可以有文物，不代表刚度的变化。在本文中，展示了一些文物的位置和形状。此外，微分方程的建立，使成像的剪切波速度，这是一个量强烈相关的剪切刚度的变化。完整的算法如下：（1）从谱方差数据中提取爬行波相位;（2）计算爬行波相位波速;（3）针对从源之一发出的波的相位求解一阶PDE;以及（4）计算剪切波速度并将其成像在图像平面中的网格上。(C)2010年美国声学学会。[DOI：10.1121/1.3442575]
The crawling wave experiment, in which two harmonic sources oscillate at different but nearby frequencies, is a development in sonoelastography that allows real-time imaging of propagating shear wave interference patterns. Previously the crawling wave speed was recovered and used as an indicator of shear stiffness; however, it is shown in this paper that the crawling wave speed image can have artifacts that do not represent a change in stiffness. In this paper, the locations and shapes of some of the artifacts are exhibited. In addition, a differential equation is established that enables imaging of the shear wave speed, which is a quantity strongly correlated with shear stiffness change. The full algorithm is as follows: (1) extract the crawling wave phase from the spectral variance data; (2) calculate the crawling wave phase wave speed; (3) solve a first-order PDE for the phase of the wave emanating from one of the sources; and (4) compute and image the shear wave speed on a grid in the image plane. (C) 2010 Acoustical Society of America. [DOI: 10.1121/1.3442575]