MRI data were obtained using a 3.0-Tesla MR scanner (Discovery MR750; GE Healthcare, Milwaukee, WI, USA), with an 8-channel head coil. Foam padding and headphones were used to limit head motion and reduce scanner noise. For structural MRI, three-dimensional brain volume imaging sequences were obtained (repetition time [TR] = 8.16 ms, echo time [TE] = 3.18 ms, inversion time [TI] = 450 ms, flip angle = 12°, matrix = 256 × 256, thickness = 1.0 mm, gaP = 0 mm, 188 slices and voxel size = 1 × 1 × 1 mm). Subsequently, DTI data were acquired using a spin-echo single-shot diffusion tensor echo planar imaging (TR = 6000 ms, TE = 61 ms, 64 diffusion gradient directions [b = 0 and 1000 s/mm2]; matrix = 128 × 128, field of view [FOV] = 256 × 256 mm; and 50 axial slices [thickness = 3 mm, gaP = 0 mm]). Finally, rs-fMRI data were acquired using a gradient-echo single-shot echo planar imaging (36 axial slices, slice thickness = 3 mm, gaP = 1 mm, TR = 2000 ms, TE = 30 ms, flip angle = 90°, FOV = 220 × 220 mm, matrix = 64 × 64, and 180 time points).
During the rs-fMRI scans, all subjects were instructed to keep their eyes closed, remain as still as possible, not to think of anything in particular and not to fall asleep. Considering that we need to monitor the patients' situation at any time and keep them relaxed, the light is on in the scanning room in this study.