Study Of The Acoustic Characteristics Of Bubbles And The Interaction With Tissue

The study of ultrasonic contrast agents is a pop subject in modern medical science. It has been widely studied to enhance the effect of images in ultrasonic diagnoses and apply cavitation effect to ultrasonic therapies by using bubbles.In this paper, the acoustic characteristic of bubbles and the interaction with tissue are studied by the experiments of sonoluminescence, the simulations and comparison of dynamics characteristic of gas bubbles and shell encapsulated bubbles, and the interaction between bubbles and tissue using single-frequency mode and dual-frequency mode ultrasound.Firstly, the motion procedures of bubbles are studied by measuring the Mie backscatter signal of single bubble sonoluminescence, and the dynamics characteristic of gas bubbles is derived qualitatively. It is concluded that the period of single bubble sonoluminescence is the same as the period of the driving voltage. The bubble augments slowly, but it shrinks quickly. The luminescence happens in the shrinking time. Secondly, by building the models of gas bubbles and shell encapsulated bubbles, the motion procedures are simulated and derived. This paper analyzes the backscatter characters of the two kinds of bubbles by changing the...