FIG 2. 59-year-old man with Alzheimer-type dementia. Dedicated ring-detector PET (dr-PET) images (upper panel) show reduced uptake in both temporoparieto-occipital regions with no other sites of reduced uptake. Dual-head coincidence gamma camera images (lower panel) show reduced uptake in bilateral temporoparieto-occipital regions as well as the dr-PET images do