Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
(Color online) Contrast agent shape variations obtained by the equivalent 3-D zero-thickness model. Oscillations near a rigid wall under a sinusoidal acoustic wave with , , and f = 2.5 MHz at an initial standoff from the rigid wall of 2.85 μm with R0 = 1.7 μm, d0 = 0.5 μm. (a) Bubble growth, (b) bubble collapse during first oscillation period.
