The dynamic deformation of a layered viscoelastic medium under surface excitation.
The dynamic deformation of a layered viscoelastic medium under surface excitation.
复制标题
DOI：
10.1088/0031-9155/60/11/4295
复制
发表时间：
2015-06-07
影响因子：
3.5
通讯作者：
Larin KV
中科院分区：
文献类型：
--
作者：
Aglyamov SR;Wang S;Karpiouk AB;Li J;Twa M;Emelianov SY;Larin KV
本文从理论和实验两方面研究了层状粘弹性介质在简谐和脉冲声辐射力作用下的动力学行为。利用Hankel变换，得到了层状粘弹性可压缩介质的频域和时间域解析解。考虑了一种特殊的不可压缩情况来模拟生物软组织。为了验证我们的理论模型，我们使用具有不同力学性能的组织状凝胶模体进行了实验。使用3.5 MHz单元件聚焦超声换能器对体模表面施加辐射力。使用相敏光学相干层析(OCT)系统跟踪体模表面的位移。将理论预测的位移与实验测量结果进行了比较。研究了介质弹性性质与深度的关系在其对表面声脉冲响应中的作用。结果表明，表面的低频振动比高频振动对深层的响应更为敏感。因此，提出的模型与谱分析相结合，可以根据地表变形的测量结果来评估力学性能随深度的分布。
In this study the dynamic behavior of a layered viscoelastic medium in response to the harmonic and impulsive acoustic radiation force applied to its surface was investigated both theoretically and experimentally. An analytical solution for a layered viscoelastic compressible medium in frequency and time domains was obtained using the Hankel transform. A special incompressible case was considered to model soft biological tissues. To verify our theoretical model, experiments were performed using tissue-like gel-based phantoms with varying mechanical properties. A 3.5 MHz single-element focused ultrasound transducer was used to apply the radiation force at the surface of the phantoms. A phase-sensitive optical coherence tomography (OCT) system was used to track the displacements of the phantom surface. Theoretically predicted displacements were compared with experimental measurements. The role of the depth dependence of the elastic properties of a medium in its response to an acoustic pulse at the surface was studied. It was shown that the low-frequency vibrations at the surface are more sensitive to the deep layers than high-frequency ones. Therefore, the proposed model in combination with spectral analysis can be used to evaluate depth-dependent distribution of the mechanical properties based on the measurements of the surface deformation.
登录
查看更多内容
影响因子：
2.4
作者：
Aglyamov, Salavat R.;Karpiouk, Andrei B.;Emelianov, Stanislav Y.
通讯作者：
Emelianov, Stanislav Y.
影响因子：
1.7
作者：
Manapuram, R. K.;Baranov, S. A.;Larin, K. V.
通讯作者：
Larin, K. V.
影响因子：
4.2
作者：
Sarvazyan, Armen
通讯作者：
Sarvazyan, Armen
影响因子：
3.4
作者：
Wang, Shang;Aglyamov, Salavat;Larin, Kirill V.
通讯作者：
Larin, Kirill V.
DOI：
10.1109/tuffc.2009.1326
发表时间：
2009-11
期刊：
IEEE transactions on ultrasonics, ferroelectrics, and frequency control
影响因子：
--
作者：
Karpiouk AB;Aglyamov SR;Ilinskii YA;Zabolotskaya EA;Emelianov SY
通讯作者：
Emelianov SY