Excitation and propagation of surface waves on a viscoelastic half-space with application to medical diagnosis
Excitation and propagation of surface waves on a viscoelastic half-space with application to medical diagnosis
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DOI：
10.1121/1.428219
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发表时间：
1999-12-01
影响因子：
2.4
通讯作者：
Sandler, RH
中科院分区：
文献类型：
--
作者：
Royston, TJ;Mansy, HA;Sandler, RH
本文给出了线性粘弹性半空间上有限刚性圆盘垂直于其表面振动产生表面波问题的解析解，该解是地震学文献中理论工作的一个进步。由于此处感兴趣的应用是医学诊断，因此使用具有与生物软组织相当的材料特性的粘弹性体模对该解决方案进行实验验证。研究结果表明，在人类软组织中的剪切粘度的文献中的先前估计在低可听频率范围内可能是不准确的。一些研究人员已经研究了由内部生物功能或外部刺激引起的皮肤表面波动的测量，以快速，非侵入性地诊断各种特定的医学疾病。人们希望，这里报道的发展将推进这些技术，并提供洞察相关的诊断方法，如声弹性成像和其他方法，利用疾病相关的变化，组织剪切弹性或密度的变化，由于气体夹杂物。(C)1999年美国声学学会。[S0001-4966（99）07712-7]。
An analytical solution is developed for the problem of surface wave generation on a linear viscoelastic half-space by a finite rigid circular disk located on the surface and oscillating normal to it. The solution is an incremental advancement of theoretical work reported in articles focused on seismology. Since the application of interest here is medical diagnostics, the solution is verified experimentally using a viscoelastic phantom with material properties comparable to biological soft tissue. Findings suggest that prior estimates in the literature of the shear viscosity in human soft tissue may not be accurate in the low audible frequency range. Measurement of wave motion on the skin surface caused by internal biological functions or external stimuli has been studied by a few researchers for rapid, nonintrusive diagnosis of a variety of specific medical ailments. It is hoped that the developments reported here will advance these techniques and also provide insight into related diagnostic methods, such as sonoelastic imaging and other methodologies that utilize disease-related variations in tissue shear elasticity or variations in density due to gaseous inclusions. (C) 1999 Acoustical Society of America. [S0001-4966(99)07712-7].