Basic Treatment Planning

Volumes in ICRU78 and ICRU83

The PTV might overlap an adjacent PRV or there might be other reasons to subdivide the PTV

ICRU: “… the delineation of the PTV margins should not be compromised” “… subdivision of the PTV into regions with different prescribed doses (so-called PTV sub-volumes, PTV SV ) may be used”

ICRU Report No.83 (2010)