Low-frequency surface wave propagation and the viscoelastic behavior of porcine skin.
Low-frequency surface wave propagation and the viscoelastic behavior of porcine skin.
复制标题
低频表面波传播和猪皮肤的粘弹性行为。
DOI：
10.1117/1.1803843
复制
发表时间：
2004
影响因子：
3.5
通讯作者：
Fang,Li
中科院分区：
文献类型：
--
作者：
Kirkpatrick,SeanJ;Duncan,DonaldD;Fang,Li
本文提出了一个描述低频表面波传播与猪皮粘弹性行为关系的物理模型，以及一系列测试该模型性能的实证研究。该模型假定蒙皮表现为半无限的、局部各向同性的粘弹性半空间。虽然违反了半无限体的假设，但从实证研究来看，这种违反似乎对模型的性能没有显著影响。1赫兹的表面波在皮肤中主要以瑞利波的形式传播，其波长和速度分别约为3米和3.0米/秒。通过跟踪后向散射激光散斑图中的声应力波引起的位移，声波的振幅随着与声源的横向距离呈指数下降。使用这种表面波传播模型，测量皮肤的机械损耗因子或tan δ，其结果与早期关于低频声波在生物组织中传播的工作一致。并且应该作为理论和经验基础，将传播表面波的波特性与组织的力学行为相结合，用于生物力学研究和潜在的诊断应用。©2004美国光电仪器工程师学会。
A physical model describing the propagation of low-frequency surface waves in relation to the viscoelastic behavior of porcine skin is presented, along with a series of empirical studies testing the performance of the model. The model assumes that the skin behaves as a semi-infinite, locally isotropic, viscoelastic half-space. While the assumption of a semi-infinite body is violated, this violation does not appear to have a significant impact on the performance of the model based on the empirical studies. 1-Hz surface waves in the skin propagate primarily as Rayleigh waves with a wavelength and velocity of approximately 3 m and 3.0 m/s, respectively. The amplitude of the acoustic wave, as measured by tracking the acoustic stress wave-induced shift in a backscattered laser speckle pattern, decreases exponentially with lateral distance from the acoustic source. Using this model of surface wave propagation, the mechanical loss factor or tan δ of the skin is measured to be on the order ofThe results presented are consistent with earlier works on the propagation of low-frequency acoustic waves in biological tissues, and should serve as a theoretical and empirical basis for using the wave characteristics of propagating surface waves in combination with the mechanical behavior of the tissue for biomechanical studies and for potential diagnostic applications. ©2004 Society of Photo-Optical Instrumentation Engineers.