Fig. 1.
Analysis of different depths of tissue. The further from the illumination point the deeper parts of tissue are penetrated (dotted line)
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.