FIGURE 3.  ¹⁸F-FDG PET (A), CT (B), and ¹⁸F-FET PET (C) images of 50-y-old man with chronic inflammatory tissue (arrows). ¹⁸F-FDG PET scan shows lesion with increased ¹⁸F-FDG uptake (SUV, 4.7) suggesting malignancy. ¹⁸F-FET PET was true negative, with no increased ¹⁸F-FET uptake (SUV, 1.3).