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.
Images of bubble clouds generated inside a gelatin phantom and at a gel-water interface (indicated by arrows). When focusing inside the gelatin phantom, one bubble cloud was generated in the gel at the transducer focus, and another was generated at the gel-water interface ~1 cm pre-focus (a) and post-focus (b). However, no bubbles were generated in between, where the pressure exceeded that at the gel-water interface. The ultrasound was propagated from left to right in both images.
