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.
Notes: The dose gradients of V5 (10%-100% of the prescribed dose) and V10 (15%-100% of the prescribed dose) are steeper than in three-dimensional conformal radiotherapy. The decreases in doses started very early and specifically in low-dose region.
