Three sections through the hippocampus and amygdala show their different proportions. Slice A through amygdala is the first notice/signal during viewing MRI slices from anterior/front to back. Slice B contains both hippocampal and amygdala areas on the slice, and it is not appropriate yet for evaluation. The optimal slice for hippocampal area measurement is slice C with the hippocampus only, without any part of amygdala. It is the first slice going back where amygdala disappears.