Figure 3: 61 years old male with history of hepatocellular carcinoma presented with Sir-Sphere radio-embolization. After 39.5 mCi Sir- Sphere radio-embolization through the right hepatic artery, the PET images were obtained, reconstructed, and viewed using volume rendering. Localizing CT scan was performed using a standard spiral MDCT protocol imaging the chest, abdomen and pelvis with 5 mm slices. CT and PET data was fused for image interpretation. PET/CT images showed heterogenous radiotracer distribution in the right hepatic lobes. There is no other radiotracer activity throughout the imaged portion of the body. A, 99mTc- MAA whole body anterior and posterior views, B, SPECT view of the abdomen, C-H, 90Y Sir-Sphere PET/CT images, C, Axial CT view, D, Axial PET view, E, Fused axial view, F, Coronal CT view, G, Coronal PET view, and H, Fused coronal view.