Plane wave elastography: a frequency-domain ultrasound shear wave elastography approach

Plane wave elastography: a frequency-domain ultrasound shear wave elastography approach
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平面波弹性成像:频域超声剪切波弹性成像方法

DOI:
10.1088/1361-6560/ac01b8
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发表时间:
2021
影响因子:
3.5
通讯作者:
Aquino, Wilkins
Aquino, Wilkins
中科院分区:
工程技术2区
文献类型:
--
作者:
Khodayi-mehr, Reza;Urban, Matthew W;Zavlanos, Michael M;Aquino, Wilkins

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在本文中,我们提出了平面波弹性成像(PWE),一种新的超声剪切波弹性成像(SWE)的方法。目前,用于SWE的商业方法依赖于基于波传播方向的先验知识的方向滤波,以去除由于反射和折射而形成的复杂波图案。其结果是一组分解的方向波,分别分析,以构建剪切模量场,然后通过复合组合。相反,PWE依赖于使用频域标量波动方程来自动选择适当的传播方向并同时重建剪切模量场的波传播的严格表示。具体地说,假设一个均匀的,各向同性的,不可压缩的,线性弹性介质,我们表示的波动方程的解,使用在任意方向传播的平面波的线性组合。鉴于此封闭形式的解决方案,我们制定的SWE问题作为一个非线性最小二乘优化问题,可以非常有效地解决。通过大量的幻影研究,我们表明,PWE可以处理复杂的波形,而无需事先过滤,是有竞争力的最先进的,需要事先过滤的基础上的知识的传播方向。
In this paper, we propose plane wave elastography (PWE), a novel ultrasound shear wave elastography (SWE) approach. Currently, commercial methods for SWE rely on directional filtering based on the prior knowledge of the wave propagation direction, to remove complicated wave patterns formed due to reflection and refraction. The result is a set of decomposed directional waves that are separately analyzed to construct shear modulus fields that are then combined through compounding. Instead, PWE relies on a rigorous representation of the wave propagation using the frequency-domain scalar wave equation to automatically select appropriate propagation directions and simultaneously reconstruct shear modulus fields. Specifically, assuming a homogeneous, isotropic, incompressible, linear-elastic medium, we represent the solution of the wave equation using a linear combination of plane waves propagating in arbitrary directions. Given this closed-form solution, we formulate the SWE problem as a nonlinear least-squares optimization problem which can be solved very efficiently. Through numerous phantom studies, we show that PWE can handle complicated waveforms without prior filtering and is competitive with state-of-the-art that requires prior filtering based on the knowledge of propagation directions.
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发表时间: 2014-06
影响因子: 2.9
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影响因子: 10.6
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梳推式超声剪切弹性成像
DOI: 10.1002/9781119021520.ch25
发表时间: 2018
期刊: Ultrasound Elastography for Biomedical Applications and Medicine
影响因子: --
作者:
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通讯作者: Shigao Chen
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发表时间: 1995-09-29
期刊: SCIENCE
影响因子: 56.9
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