Radioembolization With Intra-arterial Angiotensin II to Improve Tumor-absorbed Dose (RADIANT)

Inclusion criteria: * Patients diagnosed with primary or metastatic liver tumors (any histological type). * A clinical indication for radioembolization. * Liver tumors with a diameter ≥ 2 cm. * Age ≥ 18 years. * Competent and able to provide own informed consent (no legally designated representative). * Written informed consent. Exclusion criteria: * Any serious comorbidity preventing the safe administration of angiotensin II (AT-II). This includes: 1. Uncontrolled hypertension. 2. Treatment with ≥ 3 antihypertensive drugs. 3. Arterial (cerebro-)vascular or venous thromboembolic event within the past 6 months. * Current use of angiotensin-converting enzyme (ACE) inhibitors. * Current use of angiotensin II receptor blockers (ARBs). * Known hypercoagulable state (i.e., thrombophilia). * History of severe peripheral vascular disease. * Known hypersensitivity to the active substance in Giapreza: angiotensin II. * Known hypersensitivity to any of the excipients in Giapreza: mannitol, sodium hydroxide or hydrochloric acid. * Any serious and/or chronic liver disease preventing the safe administration of radioembolization. * Uncorrectable extrahepatic deposition of scout dose activity; activity in the falciform ligament, portal lymph nodes, and gallbladder is accepted. * Pregnancy or breastfeeding. * Body weight over 150 kg (because of maximum table load). * Known severe allergy to intravenous contrast fluids. * Participation in another investigational study which may compromise any endpoint of the study. * Any other significant comorbidity or medical condition that may compromise the safety of radioembolization.