IMRT for Prostate Cancer
PLANNING TARGET VOLUMES
Low and Intermediate Risk Patients:
GTVp
Prostate alone
GTVpb
Prostate and base of seminal vesicles
CTVpb
GTVpb+0.5cm (excluding rectum)
PTV74
GTVp + 0.5cm (excluding rectum)
PTV71
CTVpb + 0.5cm (isotropic)
High Risk Patients:
GTVp
Prostate alone +/- any involved disease
GTVpsv
Prostate and seminal vesicles
CTVpsv
GTVpsv+0.5cm (excluding rectum)
PTV74
GTVp+0.5cm (excluding rectum)
PTV71
CTVpsv+0.5cm (isotropic)