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FIGURE 3. ROC curves for PET and MRI diagnostic performances in discriminating DLB from AD. Area under ROC curve of Occ/Hipp by PET (area under the curve [Az] = 0.941) was the largest among all values. (A) Relative regional volumes of hippocampi (Hipp/TIV) and striata (Str/TIV) by MRI. (B) Relative regional glucose metabolism in hippocampi (Hipp/pons) and occipital lobes (Occ/pons) by 18F-FDG PET. (C) Affected regional ratio obtained by PET (Occ/Hipp) and MRI (Str/Hipp). TPF = true-positive fraction = sensitivity; FPF = false-positive fraction = 1 – specificity.
