Fig. 5
Comparative 18F-FDG (a, b), 68Ga-NODAGA-RGD PET/CT (c, d), and MRI (e T2w axial, f T1w post Gadolinium, g ADC map of diffusion), of patient #9 (59-year man with moderate differentiated left tonsil squamous cell carcinoma). The 18F-FDG and 68Ga-NODAGA-RGD PET images showed different signal-to-noise ratios and a slightly different distribution of activity within the tumor bed. The left cervical lymph node showed a photopenic center with absence of tracer uptake for both tracers corresponding to necrosis on MRI