AJNR -- Ge et al. 23 (8): 1334 Figure 3

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FIG 3. MTR histograms in younger (< 50 years) and older ( $>=$ 50 years) groups in healthy adults. The normalized peak height was significantly lower in the older group in both tissues. Compared with WM, GM has smaller MTR values.

A, Global GM.

B, Global WM.