Acoustical Registration of Shear Modulus Variation under HIFU in Soft Tissues

摘要

New method for noncontact measurements of shear elasticity and viscosity variations of soft materials with microstructure is proposed in the report. This method based on the analysis of amplitude-frequency response of a specially designed active tuning fork. A simple theoretical model is developed. Experimental researches were carried out on samples of biological tissues (bovine heart and liver) in vitro. The results demonstrate sensitive of the method to shear elasticity and viscosity changes, which arise in soft tissues under influence of ultrasound.