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.
A and B, A surface-rendered image reconstructed on an Advantage Windows workstation (GE Healthcare) from a CT dataset performed with a CTDIvol of 65 mGy (A) shows no discernible noise, whereas with a CTDIvol of 9.5 mGy (B), delineation of facial contours is impaired due to image noise which might, according to our initial hypothesis, render surface registration impossible.
