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.
Demonstration of the mathematical phantom. (a) 2D positions of the mathematical phantom contour (blue line), CDFs (red plus signs), and detectors (black circles). (b) 3D positions of mathematical phantom contour (inner irregular shape), outer media (outer cylinder), CDFs (red lines), and detector positions (black dots).
