Fig. 3.
T2 weighted MRI demonstrating multiple white matter and watershed bright lesions in the frontal white matter and in the corona radiata, slightly more on the left. Metabolic (FDG) PET imaging shows a severe left frontal gray matter deficit (middle panel, arrowhead). There is hypoperfusion ([15O]H2O) of the right hemisphere most marked in the right superior parietal lobe (right panel, arrowheads). The subject has recovered from a left hemiparesis, but is cognitively impaired.