Fig. 1

Hippocampal T2 relaxation time histograms for example participants. Left: Healthy control, 69-year-old female (μ = 4.68, σ = .112). Right: MCI, 87-year-old male (μ = 4.71; σ = .135). Left hippocampus is shown in both examples. Red lines on each graph represent log-logistic distribution curves fitted to each participant’s data