Abstract
Soft biological tissue elasticity is a parameter whose reliable measure is relevant to many applications in fields as diverse as medicine and the agrifood industry. The ultrasonic elastography methods are often unviable to be applied to provide such solutions. In this way, the surface wave elastography (SWE) appears as a viable alternative, due its low cost, easy to use, non-invasive-destructive character as well as its ability to provide in vivo estimates. Previous studies have described a good correlation between the overall behavior of ultrasonic elastography and SWE, although the latter overestimates the elasticity values compared to the first. It has been suggested that this is due to the influence of certain physical effects related to the exclusive use of low frequency waves, as well as by characteristics of the experimental setup and/or medium. In this work we confirm the influence of such effects and discuss different strategies to make independent the estimations thereof. This allows achieving a good agreement between the ultrasonic reference method and SWE. Thus, SWE becomes a reliable method to estimate soft biological tissue elasticity.
Highlights
Elasticity is an important parameter to assess in those areas where it is relevant to infer the intrinsic mechanical state of soft solids
It is suggested that this may be due to the influence of diffraction as well as geometric dispersion effects associated with guided waves
The characteristics of the experimental setup used in both cases allow us to assume a punctual source, since your radius is much less than the wavelength in soft solids at the typical frequencies
Summary
Elasticity is an important parameter to assess in those areas where it is relevant to infer the intrinsic mechanical state of soft solids. The interdisciplinary study of the mechanical properties of this type of medium, allows addressing complex problems of different areas of knowledge, with potential applications in different fields. The elasticity of skeletal muscle is a parameter closely related to relevant factors both for the meat industry as well as for the rehabilitative medicine, such as the tenderness of meat and muscle tone, respectively. Its applications have served both to determine the elasticity of soft biological tissues in vivo as skeletal muscle ([1], [2], [3]), or in vitro as agar-gelatin phantoms and meat ([4], [5]). The dependence between its functioning and the presence of multiple diffusers into the medium
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