SBRT 2016

The bridge to Linac based RT: Volumes

GK old

GK new

Linac RT - ICRU

PTV

-

-

TV

Target Volume (GTV)

GTV

Clinical target volume (CTV)

CTV

Planning, Planned or Peripheral Volume TVPIV, GTV in PIV, VT ∩ VP PIVTV etc.

Prescription Isodose Volume (PIV)

Treated Volume e.g. TV 20Gy

Treated Target Volume (TTV)

GTV V100%

Volume of Accepted Tolerance Dose (VATD )

Irradiated Volume

Irradiated Volume

Organ at Risk Volume

Organ at Risk (OAR) Volume

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