16 channel phase array coil

Participants were scanned on a 3 T Siemens Allegra MRI system with a 16-channel phase-array coil (Siemens, Erlangen, Germany) at ISMMS. All images were acquired along axial parallel to the anterior commissure-posterior commissure (AC-PC) plane. Eight runs of 139 T2* -weighted gradient-echo echo-planar imaging (EPI) images were acquired during each task with repetition time (TR) = 2500 ms, echo time (TE) = 27 ms, flip angle = 82°, field of view (FOV) = 240 mm, matrix size = 64 × 64, voxel size = 3.75 × 3.75 × 4 mm, and 40 axial slices of 4 mm thickness with no skip. Two additional images at the beginning of each run were discarded to allow for equilibration of T1 saturation effects. A T2-weighted anatomical volume of the whole brain was acquired using a turbo spin-echo pulse sequence (TR = 4050 ms, TE = 99 ms, flip angle = 170°, FOV = 240 mm, matrix size = 448 × 512, voxel size = 0.47 × 0.47 × 4 mm, 40 axial slices of 4 mm thickness with no skip). The entire scan session lasted approximately 1 h.

MRI acquisitions were obtained at ISMMS on a 3T Siemens Magnetom Skyra scanner with a 16-channel phase-array coil. Each scan session lasted about 1.5 hours. All images were acquired along axial planes parallel to the anterior commissure-posterior commissure (AC-PC) plane. Twelve runs of T2*-weighted images for fMRI were acquired with a gradient-echo planar imaging (GE-EPI) sequence with the following parameters: 40 axial slices of 4 mm thick, interleaved, skip = 0 mm, TR = 2000 ms, TE = 27 ms, flip angle = 77°, FOV = 240 mm, matrix size = 64 × 64, voxel size = 3.8 × 3.8 × 4 mm. Each run began with two dummy volumes before the onset of the task to allow for equilibration of T1 saturation effects, followed by the acquisition of 150 volumes. A high-resolution T1-weighted anatomical volume of the whole brain was also acquired with a magnetization-prepared rapid gradient-echo (MPRAGE) sequence with the following parameters: 176 axial slices of 0.9 mm thick, skip = 0 mm, TR = 2200 ms, TE = 2.51 ms, flip angle = 8°, FOV = 240 mm, matrix size = 256 × 256, voxel size = 0.9 × 0.9 × 0.9 mm.