FIGURE 3.

Two example cases of FTP visual stratifications. Scans that are consistent with advanced or moderate AD patterns using 3-tier visual interpretation (step 1) are further assessed in step 2. After color scale threshold adjustment, FTP scans with signal above threshold on either frontal lobe (arrows) are consistent with high tau (case 1), and others are considered not consistent with high tau. In Supplemental Figure 1, alternative color scale of same example cases is presented. MCC is captured by manually drawn 2-dimensional region of interest as described in Tauvid Food and Drug Administration label protocol (7).