ESTRO SBRT course Sept 2015
The bridge to Linac based RT: Volumes
GK now
GK new
Linac RT - ICRU
-
-
PTV
TV
Target Volume (GTV)
GTV
Clinical target volume (CTV)
CTV
Planning, Planned or
Peripheral Volume
Prescription Isodose Volume (PIV)
Treated Volume
e.g. TV
20Gy
TVPIV, GTV in PIV, VT
∩
VP PIVTV etc.
Treated Target Volume (TTV)
GTV
V100%
Irradiated Volume
Volume of Accepted Tolerance Dose
(VATD
)
Irradiated Volume
Organ at Risk Volume
Organ at Risk (OAR) Volume
45
Torrens et al. J Neurosurg. 2014 Dec;121 Suppl:2-15