Signa hde scanner

Functional MRI data were acquired using a General Electric 1.5 Tesla Signa HDe scanner at the Parc Sanitari Sant Joan de Déu. A T2*-weighted functional echoplanar imaging sequence depicting BOLD contrast was obtained using a standard head coil. In total, 270 volumes were collected with the axial plane parallel to the AC-PC axis, using the following scanning parameters: 26 slices, 4 mm thickness, 1 mm gap, TR = 2000 ms, TE = 40 ms, 24 cm FOV, 64 × 64 acquisition matrix, flip angle = 90°. The first four volumes in each run were discarded to allow for magnetic saturation effects. Visual stimuli were presented on a rear projection screen and viewed through a mirror mounted on the head coil, and all responses were collected with an MR-compatible response box (fORP, Current Designs, Inc., USA; www.curdes.com).

MRI data were acquired using a General Electric 1.5 Tesla SignaHDe scanner at Parc Sanitari Sant Joan de Déu. High-resolution T1-weighted FSPGR structural images with the axial plane parallel to the AC-PC axis were acquired using the following parameters: 2 mm slice thickness, TR = 12.24 ms, TE = 3.84 ms, FOV = 24 cm, acquisition matrix = 512 × 512, flip angle = 20°, voxel size = 0.47 × 0.47 × 2.0 mm 3 (individual voxel volume: 0.442 mm 3 ).