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.
ROI placements for manual method (top row), automated method (center row), and reference (bottom row) for two inserts in a CTN phantom at 2:1 contrast. Images are axial views at the center of the insert. Note that the centers of the ROIs may be in different slices than the ones shown. [Color figure can be viewed at wileyonlinelibrary.com]
