32 channel whole head coil

Structural magnetic resonance images (MRI) were acquired on the same 3 Tesla Philips Achieva whole body scanner, with a standard 32‐channel whole‐head coil. T1‐weighted anatomical scans were obtained at each time point (TR = 9.8 ms, TE = 4.6 ms, flip angle = 8°, 140 slices, 0.875 mm × 0.875 mm × 1.2 mm, and FOV=224 × 177 × 168 mm). Scan time for this sequence was 4 min 56 s. There were no major scanner hardware or software upgrades during the data collection period. A radiologist reviewed all T1‐weighted scans; no anomalous findings were reported.

Three-dimensional T1-weighted anatomical images were acquired on a 3 Tesla MRI scanner (Philips Achieva, Best, the Netherlands) using a standard 32-channel whole-head coil. Acquisition parameters were: repetition time = 9.8 ms, echo time = 4.6 ms, flip angle = 8°, field of view 220 × 174 × 156 mm, 130 slices with a slice thickness of 1.2 mm with no gap between slices, resulting in a voxel size of 1.15 mm × 1.15 mm × 1.20 mm.

MRI scans were made with a Philips Ingenia MR 3.0 T scanner, using a standard 32-channel whole-head coil. The functional scans were acquired using a T2*-weighted echo-planar imaging (EPI). The first two volumes were discarded to allow for equilibration of T1 saturation effects (TR = 2.2 s; TE = 30 ms; sequential acquisition, 37 slices; voxel size = 2.75 × 2.75 x 2.75 mm; Field of View = 220 × 220 x 112 mm). After the functional runs, a high resolution 3D T1-weighted anatomical image was collected (TR = 9.8 ms, TE = 4.6 ms, 140 slices; voxel size = 1.17 × 1.17 × 1.2 mm, and FOV = 224 × 177 × 168 mm). Foam inserts were used within the head coil to restrict head movement. Stimuli were projected on a screen, visible via a mirror attached to the head coil.