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Representative axial slices of FDG PET scans and cerebral blood flow (CBF) maps of two patients. Panel A depicts the normometabolic left frontal lobe (FDG AI=-5%; arrow) of patient #4. PWI demonstrated increased CBF (AI=36%) in the underlying white matter (dashed arrow). Panel B shows severe cortical glucose hypometabolism of the left occipital lobe (FDG AI= -97%; arrow) of patient #8 and concomitant decreased white matter perfusion in this area (CBF AI= -21%; dashed arrow).
