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.
(a) DVHs of the resultant plans with 7, 15, and 30 beams in the HN case, and (b) the magnified views, where the solid(-), the dashed-dotted(-•), and the dashed lines(–) correspond to 7, 15, and 30 beams, respectively. The DVHs were acquired with 75 segments for all plans. The dose conformity to the critical structures, such as brainstem and spinal cord, is improved with the greater number of beams.
