Physics Bucharest 2017

Volume definition-summary

• • •

GTV- demonstrable tumour CTV - GTV + subclinical tumour PTV - CTV + margin for uncertainties (internal margin & set-up margin)

IrV

TrV

PTV

CTV

•

TrV-

volume enclosed by

specified isodose

GTV

• IrV- tissue volume receiving dose deemed significant in relation to normal tissue tolerance • OAR- critical structure • PRV- planning organ at risk volume