Acoustic Droplet Vaporization in Biology and Medicine

Figure 1

Plot of pressure in an ultrasonic wave. Upper sinusoidal line represents the pressure inside a PFC droplet of 1 μm in diameter. Lower sinusoidal line represents the pressure of the surrounding fluid as the ultrasonic wave passes. The difference is the Laplace pressure. The vapor pressures of PFC5, PFC6, and water are indicated. The vertical arrows indicate the maximum subpressurization, and the horizontal arrows indicate the available subpressurization time.