Figure 9.

Two cases of gastric carcinoma on FDG PET-CT. (a) Axial fused FDG PET-CT image of the upper abdomen shows mild metabolic activity in the gastric cardia (with tumor involvement, white arrow). This degree of metabolic activity is similar to that in many normal patients; (b) Magnified axial fused FDG PET-CT image. A small nodular tumor on the posterior wall of the gastric antrum is only mildly metabolically active (white arrowhead) but is associated with two small hypermetabolic lymph nodes (white arrows) consistent with regional nodal spread.