Estimation of mechanical properties of gelatin using a microbubble under acoustic radiation force

9th International Symposium on Cavitation

Shirota, Eriko^1 ; Ando, Keita^1

Department of Mechanical Engineering, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama

223-8522, Japan^1

关键词: Acoustic radiation force;    Focused ultrasound;    Linear viscoelastic solid;    Measurements of;    Micro-bubble;    Spherical shape;    Terminal displacement;    Visco-elastic mediums;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/656/1/012001/pdf
DOI  :  10.1088/1742-6596/656/1/012001

来源: IOP

【 摘 要 】

This paper is concerned with observations of the translation of a microbubble (80 μm or 137 μm in radius) in a viscoelastic medium (3 w% gelatin), which is induced by acoustic radiation force originating from 1 MHz focused ultrasound. An optical system using a high-speed camera was designed to visualize the bubble translation and deformation. If the bubble remains its spherical shape under the sonication, the bubble translation we observed can be described by theory based on the Voigt model for linear viscoelastic solids; mechanical properties of the gelatin are calculated from measurements of the terminal displacement under the sonication.