An official website of the United States government
Here's how you know
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.
Histogram of multileaf collimator (MLC) positional errors following delivery of standard plans for TrueBeams (TB) (blue), Clinac 2300s (orange) and Clinac 2100s (green). For colour image see online.