Ge 3t mr750w

Structural and diffusion MRI data were obtained using a GE 3T MR750w (General Electric, Waukesha, WI) scanner with a 32‐channel head coil at the Alberta Children's Hospital in Calgary, Alberta. During the scan, children were awake and watching a self‐selected movie or sleeping naturally. The scanning protocol included T1 and whole brain diffusion weighted imaging (DWI). T1‐weighted images were obtained using a FSPGR BRAVO sequence (flip angle = 12°, 210 slices, TR = 8.23 ms, TE = 3.76 ms, spatial resolution = 0.9 × 0.9 × 0.9 mm³ resampled in the scanner to 0.45 × 0.45 × 0.9 mm³, matrix size = 512 × 512, inversion time = 540 ms). Whole brain diffusion weighted images were obtained using single‐shot spin echo echo‐planar imaging in 30 gradient encoding directions at b = 750 s/mm² (flip angle = 90°, TR = 6750 ms, TE = 79 ms, FOV = 200 mm × 200 mm, matrix size: 256 × 256 × 54). Images were acquired at 1.6 × 1.6 × 2.2 mm resolution, which was resampled to 0.78 × 0.78 × 2.2 mm on the scanner. The total T1 acquisition time was 4:12 min and the total DWI acquisition time was 4:03 min. Further information about the data set and protocol can be found elsewhere (Reynolds et al., 2020 (link)).

Imaging was conducted on a GE 3T MR750w (General Electric, Waukesha, WI) scanner equipped with a 32-channel head-coil at the Alberta Children’s Hospital in Calgary, Canada. Children were not sedated, and were watching a movie of their choice for the entire duration of the MRI scan. Headphones were equipped to receive movie audio and to communicate with scanning staff. T1-weighted data acquisition used an FSPGR BRAVO sequence with flip angle = 12º, 210 slices, TR = 8.23 ms, TE = 3.76 ms, voxel size = 0.9 × 0.9 × 0.9 mm, matrix size = 512 × 512, inversion time = 540 ms. Data acquisition for fMRI used a gradient- echo-planar imaging (EPI) sequence with TR = 2 s, TE = 30 ms, flip angle = 60º, 36 slices, voxel size = 3.59 × 3.59 × 3.6 mm, matrix size = 64 × 64, 250 vol, total scan time 8:10 min. The entire protocol including other modalities lasted 45–60 min, depending on whether sequences needed to be repeated. In some cases, children requested that the scan be stopped, or they were moving too much to collect high quality data, and the scan was stopped early.