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.
A) Systematic random sampling grid overlay on a representative region. B) One measurement frame from the sampling grid with a manually segmented nucleus (the arrows represent the scanning direction).
