Evaluating the roLe of Multiplexed PET Imaging in the Detection and Staging of hepatocellulaR Carcinoma and gAstro-entero-pancreatic Tumors

Single tracer PET/CT for the HCC patients : one with \[18F\]FDG and one with \[18F\]F-choline Single tracer PET/CT for the GEP-NET patients : one with \[68Ga\]Ga-DOTATOC and one with \[18F\]FDG

Multiplexed PET-CT for HCC patients : \[18F\]FDG + \[18F\]F-choline. Multiplexed PET-CT for GEP-NET patients : \[18F\]FDG + \[68Ga\]Ga-DOTATOC. The PET scans must be performed in any order and at least 24 hours apart.