Ge signa mri scanner

Experiments were performed on a 3.0-T GE-Signa MRI scanner (EXCITE, General Electric, Milwaukee, WI, USA) with an eight-channel phased array head coil at the Huaxi MR Research Center. We immobilized the participants’ heads with foam padding. Functional images were acquired using a single-shot, gradient-recalled echo-planar imaging sequence (TR = 2,000 ms, TE = 30 ms, and flip angle = 90°). Thirty transverse slices (FOV = 240×240 mm), which had a matrix size of 64×64 and a slice thickness of 5 mm without a gap, yielded a voxel size of 3.75×3.75×5. A total of 200 volumes were acquired and images were aligned along the anterior commissure–posterior commissure (AC–PC) line. Subjects were instructed to relax, let their minds wander, keep their eyes closed, and not fall asleep.

The participants completed three sessions of rs-fMRI. They were instructed to relax and keep their eyes closed during scanning. The data were collected with a 3T GE-Signa MRI scanner. An anatomical T1-weighted image was acquired prior to the fMRI for each subject at each session (3DT1 FSPGR, TR/TE/FA/FOV 7.9 ms/3.2 ms/11°/256 mm, 256×256 scan matrix, 180 sagittal slices, voxel size 1×1×1 mm). For the functional images a gradient-echo echo-planar imaging (GE-EPI) sequence was used. 150 images were collected for each session with whole brain coverage (TR/TE/FA/FOV 2800 ms/30 ms/90°/128 mm, 128×128 matrix, 35 axial slices, voxel size 1.72×1.72×3.5 mm).