 Based on publications Fong 1997, Scheele 1991 the following percentages are the expected disease-free survival after 9 months follow-up: for the group of patients who underwent the conventional CT strategy the expected disease-free survival rate is 70 and for the group of patients in the experimental strategy CT FDG-PET the expected disease-free survival rate is 95. To detect this difference between the two groups of 25 with a power of 80 and an alpha of 0.05 1-sided, 25 patients are required for each group Cohen 1977. To anticipate for patients not eligible for laparotomy or hepatic resection 43 patients are needed in each arm to perform the above mentioned analysis. Dropouts of patients is not anticipated. Patient accrual for this part of the analyses will be sufficient after 2 years of patient inclusion. 