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.
Axial CT images of the same insert scanned under different conditions: (a) insert at the center of the head phantom; (b) insert at the center of the body phantom; (c) insert at the periphery of the body phantom. (a) and (b) were compared to determine CT number variation with size, while (b) and (c) were compared to determine CT number variation with position.
