All scans from the dHCP were conducted on a 3.0 T Philips Achieva MRI scanner equipped with a dedicated neonatal brain imaging system, which has specially designed immobilization devices that conform to the shape of the infants’ head and assists in keeping the infants asleep and minimizing gross head motion (Hughes et al. 2017 (link)). Diffusion MRI data were acquired with a monopolar spin echo echo-planar imaging (SE-EPI) Stejskal-Tanner sequence (TR/TE, 3800/90 ms; field of view (FOV), 150 × 150 × 96 mm3; matrix, 128 × 128 × 64). The acquisition time was shorter than 20 min. There were 4 different b-value shells (0, 400, 1000 and 2600 s/mm2) and 300 diffusion encoding orientations (20, 64, 88 and 128 per b-value shell) for each subject (Hutter et al. 2018 (link)). T2-weighted scans were acquired using a turbo spin echo (TSE) sequence (TR/TE, 12 s/156 ms; resolution (mm) 0.8 × 0.8 × 1.6).
All the HCP subjects were scanned on a 3.0 T Siemens connectome—Skyra scanner with a customized protocol. For each subject, the multi-shell dMRI data have an isotropic spatial resolution of 1.25 mm and over 270 gradient directions distributed over three b values (1000, 2000, 3000 s/mm2). T1-weighted images were acquired using the 3D MPRAGE sequence with 0.7 mm isotropic resolution (Sotiropoulos et al. 2013 (link)).
All the HCP subjects were scanned on a 3.0 T Siemens connectome—Skyra scanner with a customized protocol. For each subject, the multi-shell dMRI data have an isotropic spatial resolution of 1.25 mm and over 270 gradient directions distributed over three b values (1000, 2000, 3000 s/mm2). T1-weighted images were acquired using the 3D MPRAGE sequence with 0.7 mm isotropic resolution (Sotiropoulos et al. 2013 (link)).
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