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FIGURE 4. 18F-FDG PET images of Parkinson’s disease dementia. Typical patterns of regional cerebral metabolism are similar in Parkinson’s dementia and AD, with less sparing of the occipital cortex and more sparing of the mesiotemporal area. The diagnosis of Parkinson’s disease in this patient (72-y-old woman) was subsequently confirmed by autopsy. The arrows on her scan indicate parietal (left and middle images) and occipital (middle and right images) hypometabolism, whereas the 18F-FDG uptake in basal ganglia is undiminished at this stage of her disease.
