Pilot Study to Assess Lung Shunting of Yttrium-90 Microspheres Using PET/CT

PRIMARY OBJECTIVES: I. To estimate the absolute difference in post-therapy Yttrium-90 microsphere hepatopulmonary shunt fraction and the pre-therapy Technetium-99m macroaggregated albumin hepatopulmonary shunt fraction in patients with unresectable primary hepatic malignancy and hepatic metastatic disease. SECONDARY OBJECTIVES: I. To quantify and compare the pre-therapy Technetium-99m macroaggregated albumin particle sizes and post-therapy Yttrium-90 microsphere sizes. OUTLINE: Patients receive routine pre-therapy Technetium-99m macroaggregated albumin. Patients then undergo routine radioembolization with Yttrium-90 microspheres. Within 36 hours after radioembolization, patients undergo PET/CT imaging. Available imaging, clinical, interventional and surgical follow-up data for 2 years after completion of enrollment in the study will be obtained.