Microsphere Localization Using PET/MRI or PET/CT in Patients Following Radioembolization

Inclusion Criteria: * Participant must successfully complete the MRI screening form if receiving an MRI * Participant must be scheduled to undergo radioembolization for any indication * Participant must be ≥ 18 years of age * Participant must be able to understand and willing to sign an Institutional Review Board (IRB)-approved written informed consent document Exclusion Criteria: * Participant must not have any contraindications to MRI scanning * Patient must not be pregnant or breastfeeding * If agreeing to MRI contrast, participant must not have renal insufficiency (glomerular filtration rate (GFR \< 30 mL/min/1.73 m2) measured within the past 60 days * If agreeing to MRI contrast, participant must not be on dialysis * If agreeing to MRI contrast, participant must not have had a prior allergic reaction to gadolinium-based contrast agents * PET/MRI or PET/CT is not able to be scheduled within 72 hours of radioembolization