Parametric Excitation of Shear Waves in Soft Solids

The effects of high intensity focused ultrasound on biological tissues are commonly attributed to heating or cavitation. However, as far back as 1950s it has been suggested that additional mechanical effects may also disrupt biological structures. This work investigates a nonlinear parametric excita...

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Bibliographic Details
Main Authors: Mironov, Mikhail, Konopatskaya, Irina, Pyatakov, Pavel, Clement, Gregory, Vykhodtseva, Natalia
Format: Conference Proceeding
Language:English
Online Access:Get full text
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Summary:The effects of high intensity focused ultrasound on biological tissues are commonly attributed to heating or cavitation. However, as far back as 1950s it has been suggested that additional mechanical effects may also disrupt biological structures. This work investigates a nonlinear parametric excitation of shear waves by sound wave as a potential mechanism for the small scale deformation and destruction of biological structures. Under the present theory, tissue is modeled as an isotropic soft solid. Mode coupling between longitudinal and shear modes is predicted, as accompanied by the presence of longitudinal wave amplitude fluctuations. Preliminary experiments were performed with a soft-solid model (gel-like drilling mud) and the existence of such fluctuations were established.
ISSN:0094-243X
DOI:10.1063/1.2956256