Achieva 1.5 t nova dual mr scanner

All MRI datasets were obtained using a Philips Achieva 1.5 T Nova dual MR scanner at the Department of Medical Imaging, Guangdong Second Provincial General Hospital. These datasets included rs-fMRI dataset and T1-weighted structural images. The rs-fMRI dataset [22 axial slices, repetition time (TR)/echo time (TE) = 2000 ms/50 ms, matrix = 64 × 64, field of view (FOV) = 230 × 230 mm², slice thickness = 4.5 mm without gap, flip angle = 90°] was acquired using an echo planar imaging (EPI) sequence. Each functional run contained 240 volumes (8 min) [the slices were approximately along the anterior commissure-posterior commissure (AC-PC) line and covered approximately 230 to 60 in the inferosuperior direction], and the subjects were asked to lie quietly with their eyes closed and avoid eye movement or thinking of anything specific or falling asleep while in the scanner, during the rs-fMRI data acquisition. Sagittal structural images (160 sagittal slices, TR/TE = 25 ms/4.1 ms, thickness = 1.0 mm, no gap, in-plane resolution = 231 × 232, FOV = 230 × 230 mm, flip angle = 30°) were acquired using a fast field echo (FFE) three-dimensional (3D) T1-weighted sequence.