InhaltsangabeIntroduction.- 90Y Microspheres: Concepts and Principles.- Regulations and requirements of hospitals performing radioembolization.- Radiological evaluation of patients with liver tumors.- Vascular anatomy and its implication in radioembolization.- Radioembolization: Identifying and managing anatomic variants.- Dosimetry and Dose Calculation.- Nuclear Medicine Procedures for Treatment Evaluation.- Histologic evaluation after Liver Radioembolization.- Radiological Detection and Assessment of Tumor Response.- Evaluation of the response by multimodality imaging.- Results in hepatocellular carcinoma.- Radioembolization combined with other therapeutic local and systemic treatments in hepatocellular carcinoma.- Results in Liver Metastatic Colorectal Cancer.- Radioembolization combined with other therapeutic local and systemic treatments in colorectal liver metastases.- Use of Yttrium-90 Radioembolization in the Treatment of Unresectable Hepatic Metastases from Neuroendocrine Tumors.- Ytrium 90 Radioembolization for other liver metastases.- Complications and side effects.- Radioembolization Induced Liver Disease.- Future Directions in Radioembolization.