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Fig 3. Left upper: contrast-enhanced T1WI. Right upper: FLAIR image. Left lower: MET PET. Right lower: MET PET is superimposed on contrast-enhanced T1WI. A, A 31-year-old man presented with diffuse astrocytoma that had a lower MET uptake and proliferative activity (MET T/N ratio, 1.00; Mib-1 LI, 1.1%). B, A 37-year-old man presented with diffuse astrocytoma with a higher MET uptake and proliferative activity (MET T/N ratio, 3.25; Mib-1, LI, 5.6%). C, A 35-year-old man presented with oligodendroglioma with a higher MET uptake and lower proliferative activity (MET T/N ratio, 4.71; Mib-1 LI, 3.0%).
