Signa hde 1.5 t ge scanner

After clinical interview and assessment, participants underwent MRI examination. The MRI data were acquired on a Signa HDe 1.5-T GE scanner (GE Medical Systems, Milwaukee, WI, U.S.A.) equipped with an 8-channel phased-array head coil at the First Affiliated Hospital of Jinan University. Diffusion-weighted images were obtained using echo-planar imaging (TR = 10000 ms; TE = 95.4 ms; flip angle = 90°; FOV = 120×120 mm; matrix = 128×128; slice thickness = 4.0 mm; Number of axial slices = 30). Diffusion-sensitizing gradient encoding was applied in 25 different directions with a diffusion-weighing factor of b = 1000 s/mm² and one without diffusion gradient (b = 0) image. Images were acquired parallel to the anterior-posterior commissure. A high-resolution T1-weighted anatomical image was acquired by using a 3-dimensional fast spoiled gradient recalled (FSPGR) sequence with 128 contiguous slices (TR = 8 ms; TE = 1.7 ms; flip angle = 20°; FOV = 240 mm×240 mm; matrix = 256×256; slice thickness = 1.0 mm). Magnetic field uniform was reached before each scanning. All the images were visually inspected for clinical abnormalities and common artifacts by a radiologist (C.Z. S.) prior to analysis.