Discovery mr750 3t mri

MRI image data for the SAND were acquired on a GE Discovery MR750 3 T MRI scanner with an 8-channel head coil. Data acquisition included a T1-weighted structural scan and an 8 min rs-fMRI scan obtained using functional T2*-weighted BOLD images with a gradient echo spiral sequence (TR = 2000 ms, TE = 30 ms, 40 contiguous 3 mm axial slices, flip angle = 90°, FOV = 22 cm, voxel size = 3.44 mm × 3.44 mm × 3 mm) aligned with the AC-PC plane. Resting-state functional images were collected while participants were awake, passively viewing a fixation cross at the end of the scanning session. Slices were acquired contiguously. Images were reconstructed offline using processing steps to remove distortions caused by magnetic field inhomogeneity and other sources of misalignment to the structural data. Standard preprocessing, slice timing, realignment and coregistration to the structural scans, and normalization to MNI 152 space, and a spatial smoothing using a Gaussian kernel (6 mm) was completed in SPM12 using defaults. The top five white matter components were regressed out as well. All brain activity was filtered through a bandpass filter between 0.01 and 0.1 Hz.