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.
Experimental phantom: (a–b) Two views from above the black-box including the phantom and collimator bricks. (c) Image taken by the high-sensitivity CCD camera of the phantom under ambient light and no irradiation, (d) CCD image with no ambient light and X-ray irradiation.
