83 / 1311
Target volumes – PTV
•
ICRU 62 had 2 components to the PTV:
Internal Margin IM
Set-up Margin SM
•
BIR 2003 suggests 2 different components:
Systematic error margin STV
*
Random error margin (STV to PTV margin)
•
The
concept
of the PTV remains the same
*
STV= Systematic Target Volume