Figure 3.
Coronal (a) and axial planes (b) in a case with multiple air interpositions between the skin and the transducer. The air appears as hypoechoic images with posterior shadowing.
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.