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Fig. 9 | Insights into Imaging

Fig. 9

From: Multimodality imaging of neurodegenerative disorders with a focus on multiparametric magnetic resonance and molecular imaging

Fig. 9

A 73-year-old man with memory loss and visuospatial processing deficits. Fluorodeoxyglucose PET/CT demonstrates hypometabolism in the bilateral parietal lobes including the bilateral precuneus with preserved metabolism of the PCC (cingulate island sign, oval in a). Also present is hypometabolism of the bilateral lateral occipital lobes with preserved medial occipital lobe activity (occipital tunnel sign, asterisk in b). Single-subject statistical parametric mapping (c) demonstrates parietal-occipital hypometabolism reiterating the occipital tunnel (arrow bottom left panel) and posterior cingulate island (arrow bottom right panel), with areas of blue progressing to purple representing further negative deviation from the mean uptake values of controls

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