3t hdx excite mri scanner

Structural and functional data were acquired with a GE 3 T HDx Excite MRI scanner. Structural MRI data acquisition in all participants was based on a T1-weighted 3D fast spoiled gradient-echo sequence (TR, 7.8 ms; TE, minimum full; flip angle, 20°; matrix size, 256 × 256; 176 slices; voxel size, 1.13 × 1.13 × 1 mm). A gradient-echo EPI sequence was used to collect functional data from 60 interleaved bottom-up axial slices aligned with the temporal lobe (TR, 3 s; TE, 18.9 ms; FOV, 192 × 192 × 180 mm; matrix size, 64 × 64; slice thickness, 3 mm; slice gap, 3 mm; voxel size, 3 × 3 × 3 mm³; flip angle, 90°). An intermediary FLAIR scan with the same orientation as the functional scans was collected to improve the coregistration between subject-specific structural and functional scans.

Structural and functional data were acquired with a GE 3T HDx Excite MRI scanner at the York Neuroimaging Centre (YNiC), in a single scanning session. A Magnex, 8-channel, gradient insert head coil with a birdcage and radio frequency coil tuned to 127.4 MHz was used. A gradient-echo EPI sequence was used to collect data from 39 contiguous axial slices (TR, 3 s; TE, 25 ms; FOV, 260 mm²; matrix size, 128 × 128; slice thickness, 3.5 mm). The functional data were coregistered onto structural T1-weighted images with a resolution of 1 × 1 × 1 mm (TR, 8.03; TE, 3.07 ms; FOV, 290 × 290 176 mm; matrix size, 256 × 256 × 176; slice thickness, 1.13 × 1.13 × 1 mm). Functional data were additionally coregistered to T1-weighted FLAIR images (5.6 × 5.6 × 3.5 mm), taken in the same plane as the EPI slices with interleaved slice acquisition.

Brain imaging data were acquired at the York Neuroimaging Centre using a GE 3T HDX Excite MRI scanner and an eight-channel phased array head coil tuned to 127.4 MHz. The parameters for the functional and structural recordings were the same for Group A and B. The imaging session started with a 9 min eyes-open resting state functional scan using a gradient single-shot echo planar imaging (EPI) sequence with repetition time (TR) 3000 ms, echo time (TE) minimum full, 180 volumes, flip angle 90°, voxel size 3 × 3 × 3 mm³, matrix size 64 × 64, field of view (FOV) 192 × 192 mm², slice thickness 3 mm and 60 slices with an interleaved (bottom up) acquisition order. The structural data were recorded using a sagittal isotropic 3D fast spoiled gradient-recalled echo (3D FSPGR) structural T1 weighted scan with the following parameters: TR 7.8 ms, TE minimum full, flip angle 20°, matrix size 256 × 256, 176 slices, voxel size 1.13 × 1.13 × 1 mm³, FOV 290 × 290 mm². For each participant, a high-resolution T1-weighted in-plane anatomical picture was also acquired using a fluid attenuated inversion recovery (FLAIR) in order to facilitate the co-registration of the functional data onto the structural images.