Fig. 1.
A representative example of a four fields treatment plan. Isodose lines depicted are 100% (yellow), 95% (green), 50% (purple), 37.5% (blue) and 25% (orange).
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.