Role of structural anisotropy of biological tissues in poroelastic wave propagation.
Role of structural anisotropy of biological tissues in poroelastic wave propagation.
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DOI：
10.1016/j.mechmat.2011.08.007
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发表时间：
2012-01
期刊：
影响因子：
--
通讯作者：
Cowin SC
中科院分区：
文献类型：
--
作者：
Cardoso L;Cowin SC
超声波作为成像和医疗状况诊断中的非破坏性测试方法具有广泛的临床应用。通常，生物组织被建模为具有表观密度的均匀化等效介质，单个波通过该均匀化等效介质传播。只有到达超声探头的第一波才用于测量声速。然而，已经报道了在诸如松质骨的组织中存在第二波，并且其存在是毕奥型多孔弹性介质的明确特征。考虑到超声波对微结构和密度的敏感性，最近发展了一种依赖于织物的各向异性多孔弹性超声波（PEU）传播理论。这一发展的关键是列入织物张量-定量体视学测量骨结构各向异性的程度-到线性孔隙弹性理论。在本研究中，这个框架被扩展到几个软组织和硬组织中的波的传播。结果发现，软组织中的胶原纤维和硬组织中的矿化基质是负责实体组织成分的各向异性通过织物张量在模型中。
Ultrasound waves have a broad range of clinical applications as a non-destructive testing approach in imaging and in the diagnoses of medical conditions. Generally, biological tissues are modeled as an homogenized equivalent medium with an apparent density through which a single wave propagates. Only the first wave arriving at the ultrasound probe is used for the measurement of the speed of sound. However, the existence of a second wave in tissues such as cancellous bone has been reported and its existence is an unequivocal signature of Biot type poroelastic media. To account for the fact that ultrasound is sensitive to microarchitecture as well as density, a fabric-dependent anisotropic poroelastic ultrasound (PEU) propagation theory was recently developed. Key to this development was the inclusion of the fabric tensor - a quantitative stereological measure of the degree of structural anisotropy of bone - into the linear poroelasticity theory. In the present study, this framework is extended to the propagation of waves in several soft and hard tissues. It was found that collagen fibers in soft tissues and the mineralized matrix in hard tissues are responsible for the anisotropy of the solid tissue constituent through the fabric tensor in the model.
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影响因子：
3.9
作者：
COWIN, SC
通讯作者：
COWIN, SC
影响因子：
2.4
作者：
Anderson, Christian C.;Marutyan, Karen R.;Miller, James G.
通讯作者：
Miller, James G.
影响因子：
6.2
作者：
Cardoso, L;Teboul, F;Meunier, A
通讯作者：
Meunier, A
影响因子：
3.2
作者：
BIOT, MA
通讯作者：
BIOT, MA
影响因子：
2.4
作者：
Fellah, ZEA;Chapelon, JY;Depollier, C
通讯作者：
Depollier, C