Figure 11. Effects of increasing P(-)LS on bubble cloud behavior.
Optical images show bubble clouds formed from the 500 kHz transducer at P(-)LS values between 25.4–40.5 MPa in tissue phantoms with Young’s moduli of 1.13 kPa (top) and 570 kPa (bottom). Results demonstrated an increase in the size of the bubble cloud with increasing pressure. However, no significant change in the size of individual bubbles within the clouds was observed with increasing P(-)LS.