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 histogram for an average of matched intensity-modulated radiation therapy (IMRT) and pencil beam scanning proton therapy (PBSPT) plans: planning target volume (A); both lungs (B); esophagus (C); heart (D); spinal cord (E). Abbreviations: IMRT, intensity-modulated radiation therapy; PBSPT, pencil beam scanning proton therapy.
