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.
Cartoon illustration of optical scattering from density gradients in cells (A), and a diagram of the optical geometry for the fiber-optic tissue measurements (B). Fiber tips are in optical contact with the tissue surface. Only light that has scattered elastically within the epithelial layer is collected.
