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T2‐weighted, MTR, and APTw magnetic resonance images of a 7‐month‐old child with DD (A) and a 7‐month‐old normal child (B). Compared with the normal controls, the MTR signal intensities of the child with developmental delay are lower, while the APTw signal intensities are higher in the centrum semiovale (white arrows). T2W, T2‐weighted; MTR, magnetization transfer ratio; APTw, amide proton transfer‐weighted.
