positron emission tomography
References
Liangpunsakul S, Agarwal D, Horlander JC, Kieff B, Chalasani N. Positron emission tomography for detecting occult hepatocellular carcinoma in hepatitis C cirrhotics awaiting for liver transplantation. Transplant Proc. 2003 Dec;35(8):2995-7. PMID: 14697959