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.
Diagram of mean x-ray exposure (in milligrays) at each probe position in the circular (left) and ellipsoid (right) phantoms during closed and open arc cone-beam CT (CBCT), respectively. For the circular phantom, weighted CTDI (CTDIw) was similar for both closed and open arc cone-beam CT, whereas for the ellipsoid phantom, weighted CTDI was slightly lower during open arc cone-beam CT.
