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.
Histological studies of porcine skin exposed to low-frequency ultrasound (20 kHz). (A) Porcine skin not exposed to ultrasound. (B) Porcine skin exposed to low-frequency ultrasound. The scale bar corresponds to 10 μm in both figures. No significant difference can be seen between the two figures. If the 10 μm microjets had penetrated into the SC, a significant disruption of the SC should have been observed.
