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. 2019 May 13;92(1101):20181027. doi: 10.1259/bjr.20181027

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© 2019 The Authors. Published by the British Institute of Radiology

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Figure 4. — (A) AD - typical appearances of ¹⁸F-FDG PET with severe hypometabolism of the parietal (white arrows) and temporal lobes (red arrows) - in this case left >right. There is also hypometabolism in the precuneus and posterior cingulate gyrus (arrowhead). (B) AD - atypical appearances of ¹⁸F-FDG PET with small regions of hypometabolism in the frontal and parietal lobes bilaterally (green arrows), more marked on the left, and inferior left temporal lobe (orange arrow). The appearances are not definitive for AD on ¹⁸F-FDG PET, although the subsequent amyloid PET was positive.