Full wave simulation of arterial response under acoustic radiation force.
Full wave simulation of arterial response under acoustic radiation force.
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DOI：
10.1016/j.compbiomed.2022.106021
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发表时间：
2022-10
影响因子：
7.7
通讯作者：
中科院分区：
文献类型：
--
作者：
本文的最终目标是利用剪切波弹性成像估计动脉粘弹性，提出了一种模拟人体颈动脉在声辐射力 (ARF) 下的响应的实用方法。动脉被理想化为浸没在不可压缩、无粘性流体中的几乎不可压缩的粘弹性空心圆柱体。为了实现这种理想化，我们开发了一种多步骤方法，用于有效计算复杂 ARF 激励下的三维响应，同时捕获动脉壁与周围流体之间的流体-结构相互作用。具体步骤包括（a）通过半解析有限元公式进行降维，（b）使用传统和最新技术进行有效的有限元离散化。通过利用（c）模态叠加，然后在适当的情况下使用（d）脉冲响应函数，可以进一步提高计算效率。除了开发方法之外，还对典型的动脉几何形状进行收敛分析，从而提出有关各种离散化参数的建议。最后，计算工作量比使用有限元方法的传统全三维分析少了几个数量级，从而可以对 ARF 激励下的动脉反应进行实用而准确的模拟。
With the ultimate goal of estimating arterial viscoelasticity using shear wave elastography, this paper presents a practical methodology to simulate the response of a human carotid artery under acoustic radiation force (ARF). The artery is idealized as a nearly incompressible viscoelastic hollow cylinder submerged in incompressible, inviscid fluid. For this idealization, we develop a multi-step methodology for efficient computation of three-dimensional response under complex ARF excitation, while capturing the fluid-structure interaction between the arterial wall and the surrounding fluid. The specific steps include (a) performing dimensional reduction through semi-analytical finite element formulation, (b) efficient finite element discretization using traditional and recent techniques. The computational efficiency is further enhanced by utilizing (c) modal superposition, followed by, where appropriate, (d) impulse response function. In addition to developing the methodology, convergence analysis is performed for a typical arterial geometry, leading to recommendations on various discretization parameters. At the end, the computational effort is shown to be several orders of magnitude less than the traditional, fully three-dimensional analysis using finite element methods, leading to a practical yet accurate simulation of arterial response under ARF excitations.
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影响因子：
37.8
作者：
Sutton-Tyrrell, K;Najjar, SS;Newman, A
通讯作者：
Newman, A
DOI：
10.1109/58.139123
发表时间：
1992-03-01
影响因子：
3.6
作者：
JENSEN, JA;SVENDSEN, NB
通讯作者：
SVENDSEN, NB
影响因子：
2.4
作者：
DATTA, SK;SHAH, AH;CHAKRABORTY, T
通讯作者：
CHAKRABORTY, T
影响因子：
4.7
作者：
GAVRIC, L
通讯作者：
GAVRIC, L
影响因子：
2.4
作者：
Roy, Tuhin;Guddati, Murthy N.
通讯作者：
Guddati, Murthy N.