<qa>  What is the purpose of the study?This study aims at testing the utility of PET Scan as a screening tool for liver transplantation in patients with Hepatocellular Carcinoma. Patients being worked up for liver transplant for hepatocellular carcinoma will undergo a PET Scan and will be followed until 2 years after transplantation. At that time survival data will be analysed according to PET Scan results to determine if it can be used to predict outcome. 