Present imaging modalities for primary liver cancer (hepatocellular carcinoma or HCC) have several shortcomings. One important shortcoming is the time delay between successful treatment and radiological confirmation of this response. Often it takes several months for anatomical changes to occur and to be appreciated on morphological imaging such as CT or MRI (shrinkage of tumor, absence of contrast enhancement). Functional imaging by means of Fluor-18 deoxyglucose or Fluor-18 Choline (positron emitters, PET-scan) might be an early indicator of response. This "early" information might help to tailor treatment. For instance, if no response is induced, an early switch in therapy can be planned.

The present study investigates whether the routine PET-tracer (Fluor-18 deoxyglucose) and the experimental PET-tracer, Fluor-18 Choline help to predict response if a patient with inoperable primary liver cancer is treated (radionuclide therapy, biologicals).

Inclusion Criteria :

• Male and female are eligible

  ->18years of age.No upper age limit.

• not pregnant or breastfeeding

• capable of understanding the study goals and protocol and to sign the informed consent.

• Patients are diagnosed with primary liver cancer and referred for treatment with biologicals such as Sorafenib or treatment with radionuclides.