- The diagnosis of hepatocellular carcinoma may be made on a clinical basis without the need for a biopsy if the following criteria are met: a) Documentation of hepatitis B or C infection b)Liver mass with characteristic imaging (CT or MRI) features of hepatocellular carcinoma c) Alpha-feta protein (AFP) level greater than 20 ng/mL 3. Planned curative external beam RT as part of the patients treatment for the cancer diagnosis.