Discovery mr scanner

MRI scans were collected by a 3-Tesla GE Discovery MR scanner with an 8-channel head coil at the Affiliated Hospital of North Sichuan Medical College. T1-weighted images were acquired using a three-dimensional fast spoiled gradient-echo sequence. The parameters were repetition time (TR) = 6.008 ms, echo time (TE) = 1.984 ms, matrix size = 256 × 256, flip angle (FA) = 9°, field of view (FOV) = 256 mm × 256 mm, voxel size = 0.94 mm × 0.94 mm × 1 mm, and slice thickness (no gap) = 1 mm. During the whole resting-state scan, the subjects were instructed to close their eyes, relax and avoid thinking about anything in particular, and stay awake. Resting-state functional data were acquired using an echo-planar imaging sequence. The parameters were as follows: TE = 30 ms, FOV = 240 mm × 240 mm; voxel size = 3.75 mm × 3.75 mm × 4 mm, TR = 2000 ms, FA = 90°, matrix size = 64 × 64, slice thickness = 4 mm, slice spacing = 0.4 mm, number of slices = 35, slice order = interleaved, and view order = bottom-up. The scan lasted for 410 s for each participant, and 205 volumes were generated.