Intera achieva 3.0t scanner

All images were acquired using a Philips Intera Achieva 3.0T scanner. For the resting-state functional magnetic resonance imaging (fMRI), 34 trans-axial gradient-echo images (64 × 64 matrix, repetition time (TR) = 2000 ms, echo time (TE) = 30 ms, field of view (FOV) = 24 cm, 3.75 mm slice thickness, voxel size = 3.75 × 3.75 × 3.75 mm³) covering the entire brain were acquired using an echo planar sequence. For this scan, 160 functional volumes (scan duration of 5 min and 20 s) were obtained while subjects were resting (opening their eyes and not moving, not sleeping, and not thinking about anything). Three-dimensional T1-weighted images were collected using a magnetization-prepared rapid gradient-echo (MPRAGE) sequence (240 × 240 matrix, TR = 6.5 ms, TE = 3 ms, inversion time (TI) = 711 ms, FOV = 24 cm, 162 slices, 1.0 mm slice thickness, voxel size = 1.0 × 1.0 × 1.0 mm³, scan duration of 8 min and 3 s).

MRI data from all subjects were obtained at Chung Ang University Hospital using an Intera Achieva 3.0 T scanner (Philips, Amsterdam, the Netherlands). Acquisitions consisted of a set of 180 axial cuts parallel to the anterior commissure-posterior commissure line with a slice thickness of 1 mm and a voxel size of 1×1×1 mm.3 These measurements were collected using the spoiled gradient recalled acquisition sequence (repetition time 10 msec, echo time 4 msec, and image matrix 256×256).