Folie 1

The bridge to Linac based RT: Volumes

GK old

GK new

Linac RT - ICRU

PTV

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

Torrens et al. J Neurosurg. 2014 Dec;121 Suppl:2-15