Figure 4.

(a) M2's evolution on amino acid PET. 11C-Methionine PET (MET PET, left), MET PET fused with MRI CE T1 (middle) and MRI CE T1 weighted (right) axial images at 7 months demonstrating intermediate focal MET uptake in the medial aspect of the ring enhancing right cerebellar lesion (T/N ratio = 1.5 compared to contralateral mirrored tissue) and local edema. (b) MET PET (left) at 10 months now demonstrating T/N ratio = 1.3, diminished compared to MET PET 3 months prior, MET PET fused with MRI CE T1 (middle) and MRI CE T1 weighted (right): suspected ARE