3.1.2. Imaging characteristics of F-FDG PET / CT - Comparison of CT and F-FDG PET / CT for staging Table 3.3: Comparison of CT and 18F-FDG PET / CT for staging Stage CT 18F-FDG PET / CT n% n% Tumor T1 - 2 7 7.6 7 7.6 T3 81 88.0 76 82.6 T4b 4 4.4 9 9.8 Node N0 34 37.0 7 7.6 N1 49 53.2 42 45.7 N2 7 7.6 35 38.0 N3 2 2.2 8 8.7 Metastasis M1 1 1.1 3 3.3 Most of the tumors were stage T3.