MRI examinations were performed on living very preterm infants using Skyra 1.5-T Siemenz MR system (Siemenz Medical Systems, Avanto, Germany) in accordance with the standard protocol[6] for the imaging of newborn infant brains. The scans included at least T1-weighted (repetition time/echo time (TR/TE, 1860 ms/8.5 ms), T2-weighted (TR/TE, 4670 ms/99 ms), diffusion-weighted (TR/TE2, 3600 ms/ 102 ms), and susceptibility-weighted (TR/TE, 49 ms/40 ms) images on the transverse plane. MRI examinations were performed at approximate TEA, preferably between the 40-week and 44-week postmenstrual ages (PMA, i.e, TEA-MRI).

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