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) Axial CT slice showing conformality of intensity modulated radiation therapy. Radio-opaque markers are apparent in the anterior aspect of the prostate gland. (b) Axial CT slice showing conformality of proton beam radiation therapy in the same patient as panel a. More sparing of the anterior-lateral rectal wall and less dose to peripheral tissues is apparent.
