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.
R50% (unitless) vs planning target volume (PTV) mean dose. Plots of R50%(unitless) vs PTV Mean Dose (Dav) as % of Rx Dose for a tissue equivalent PTV density (0.9 g/cc) of both spherical and cylindrical shapes for volumes: (a) 9 cc, (b) 33 cc, (c) 53 cc, and (d) 81 cc. Note the minimum in R50% that occurs near Dav = 110% of Rx dose for all volumes and shapes.
