Insonified microbubbles were observed in vessels within a gel with a Young's modulus
similar to that of tissue, demonstrating shape instabilities, liquid jets, and the formation of
small tunnels. In this study, tunnel formulation occurred in the direction of the propagating
ultrasound wave, where radiation pressure directed the contact of the bubble and gel,
facilitating the activity of the liquid jets. Combinations of ultrasonic parameters and
microbubble concentrations that are relevant for diagnostic imaging and drug delivery and …