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.
FPD images (blue layer) overlaid on DRR images (orange layer). (a) Vertical and (b) horizontal images before registration and (c) vertical and (d) horizontal images after registration for a patient with a pelvic tumor. Yellow line shows planning target volume (PTV). Registration accuracy was TRE = 0.1 mm and AE = 0.1° with ZNCC + GD. White arrows marked in lower panels are positional errors, which differ from the referenced DRR images.
