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FIGURE 2. ROIs drawn over areas with significant decrease of rCBF in early AD. ROIs were classified into 5 specific areas as follows (numbers with open parentheses denote numbers of pixels included in ROIs): (1) posterior cingulate gyri and precunei: PCG&PC (r = 321 pixels, l = 280 pixels); (2) lower and medial temporal areas: MT (medial temporal areas) (r = 82 pixels, l = 79 pixels), BMT (basal medial temporal area) (r = 60 pixels, l = 112 pixels), and BTl (lateral basal temporal area) (r = 54 pixels, l = 74 pixels); (3) parietal association cortex: PAl (lateral parietal association cortex) (r = 279 pixels, l = 174 pixels), PAp (posterior parietal association cortex) (r = 320 pixels, l = 439 pixels), and Pas (superior parietal association cortex) (r = 543 pixels, l = 496 pixels); (4) temporal association cortex: TAl (lateral temporal association cortex) (r = 172 pixels, l = 367 pixels), TAp (posterior temporal association cortex) (r = 223 pixels, l = 241 pixels); (5) anterior cingulate gyri: ACG (r = 188 pixels, l = 256 pixels).
