FIG 4.

[¹⁸F] FDG-PET cortical surface maps demonstrate an abnormal FDG distribution pattern with moderate-to-severe hypometabolism in the left, lateral temporoparietal lobes including in the left precuneus and posterior cingulate gyrus (A), with corresponding disproportionate cortical atrophy in the lateral left temporoparietal region visualized on brain CT (B), findings are further supported by a semiquantitative FDG-PET analysis using z scores calculated in comparison with age-matched cognitively healthy controls, demonstrating markedly decreased values in the left parietal and left lateral temporal regions, including in the precuneus and posterior cingulate gyrus (B).