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.
Examples of the single region and multiple subregion ROIs. A zoomed-in image of the single (1 × 1) ROI is shown on the left, and zoomed-in images of the 2 × 2 and 3 × 3 segmentations to produce the subregions are shown in the middle and right, respectively.
