Fig. 2. Superimposed 7.0-T MRI images and HRRT-PET images of bilateral hippocampi in a healthy subject (A) and an early-stage AD patient (B). HRRT-PET images were produced using the same thresholds in healthy controls and AD patients. The white and black arrows indicate the location of the hippocampus. (C) Glucose metabolism quantified in the entire hippocampi. The asterisks indicate significant differences at p<0.05. Data are mean and SD values. AD: Alzheimer's disease, CA: cornus ammonis, DG: dentate gyrus, HRRT: high-resolution research tomograph, MRI: magnetic resonance imaging, PET: positron-emission tomography.