Positive nodes (N+) or metastatic disease (M+)

Inflammatory bowel disease, collagen- vascular disorders or active autoimmune disorders

Anticoagulant treatment in progress

Hip or pelvic presence of medical devices that could prevent a correct image acquisition

Symptomatic haemorrhoidal disease

Adverse reactions to iodinate or paramagnetic contrast media

Previous malignant cancer, except basocellular skin tumour or other tumours healed since 5 years

Previous pelvic radiotherapy

Psychiatric disorder that preclude to obtain informed consent

Stereotactic Volumetric Radiotherapy in Prostate Cancer