12 channel phased array coil

A Siemens 3T Trio Tim MRI scanner with a 12‐channel phased‐array coil was used to collect structural and functional MRI data. Functional MRI acquisition employed gradient‐echo echoplanar imaging sequence sensitive to blood oxygen level–dependent contrast. Whole‐brain coverage was obtained using repetition time 3 seconds, flip angle 85 degrees, echo time 30 ms, matrix 72 × 72, field of view 216 × 216 mm, and 47 × 3 mm axial slices, which resulted in isotropic voxels of 3 mm. A total of 124 volumes were acquired in each run. During the scan, participants were asked to remain awake, lie flat with their eyes open, and with a visible crosshair projected on a screen.

The MRI data were acquired on a Siemens 3T Trio MR scanner with a 12-channel phased array coil. DTI acquisition involved a single-shot, spin-echo planar imaging sequence in contiguous axial planes that covered the whole brain. Diffusion-sensitizing gradients were applied in 12 non-collinear directions, together with acquisition without diffusion weighting (b = 0). The imaging parameters were set to the following values: TR = 6,600 ms, TE = 89 ms, average = 4, b-value = 1,000 s/mm², slice thickness = 2.5 mm, 50 slices. The matrix resolution was acquired at 128 × 128 and reconstructed to 256 × 256. The resolution was 2 × 2 × 2.5 mm³. The subjects were told not to move during the scans, and a Siemens dedicated filler was used to prevent head movement. The acquisition time for the scan was 6 minutes and 5 seconds.