【摘 要】
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Background, Motivation and Objective Viscoelastic (VE) properties of materials can be determined by observing shear wave propagation following an impulsive excitation and measuring the frequency depen
【机 构】
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Biomedical Engineering, Duke University, Durham, North Carolina, USA
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Background, Motivation and Objective Viscoelastic (VE) properties of materials can be determined by observing shear wave propagation following an impulsive excitation and measuring the frequency dependent phase velocity c(f) and attenuation α(f). Nenadic, et al. [2014 IEEE-IUS proceedings] have described a method to measure c(f) and α(f) from the two dimensional Fourier transform (2DFT) of a spatial-temporal shear wave signal. This procedure assumes the shear wave is described as either a plane wave or as the asymptotic form of a cylindrically expanding wave and does not take into account the size and shape of the excitation source or observation of the shear wave at non-asymptotic locations near the source.
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