TVD 2017

CTV to PTV (Planning Target Volume) OAR to PRV (Planning Organs at Risk Volume)

ICRU (International Comission on Radiation Units and Mesuraments ) 50 and 62

CTV margin for creating PTV: - geometrical errors - internal motion of CTV - treatment technique (beam orientation) - intra and interfractional errors (patient fixation, daily setup errors)

OAR margin for creating PRV: movements of the OAR due to the change in size and setup uncertainities