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.
Dose–volume histograms of organs at risk for proton (blue) and photon (red) patients: (A) brainstem, (B) spinal cord, (C) oral cavity, (D) contralateral parotid gland, (E) contralateral submandibular gland, (F) larynx. (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.)
