Trio tim 3 t mr scanner

We obtained MRI data using a Siemens Trio Tim 3 T MR scanner. Both DTI and T1-weighted data were acquired using a 12-channel phased-array head coil with the implementation of the parallel imaging scheme of Generalized Auto-calibrating Partially Parallel Acquisitions and with an acceleration factor of 2. DTI data were acquired using a single-shot twice-refocused spin-echo diffusion echo planar imaging (EPI) sequence (repetition time 10000 ms, echo time 92 ms, 64 non-linear diffusion directions with b = 1000 s/mm², an additional volume with b = 0 s/mm², data matrix 128×124, field of view 256 × 248 mm, slice thickness 2 mm, isotropic voxel size 2 mm³) and 75 transverse slices without gap covering the whole brain for each. The acquisition time was approximately 12 min for each DTI scan. High resolution 3D isotropic structural images (voxel size 1 mm³) were acquired using a T1-weighted magnetization prepared rapid gradient echo sequence (repetition time 1900 ms, echo time 3.44 ms, inversion time 900 ms, flip angle 9°, field of view 256 × 256 mm, slice thickness 1 mm) and 176 sagittal slices covering the whole brain.

Functional magnetic resonance imaging data were acquired using a Siemens Trio Tim 3T MR scanner equipped with a 12-channel phased-array receiver coil. It was designed to enable the participants to lie on their backs during the experiment. Sponge pads on the left and right sides of the head were fixed in the coil to reduce head movement. A projector connected to the computer projected the experimental content onto a screen in the imager. A single-shot gradient echo planar imaging sequence was used for functional imaging. The specific parameters were as follows: TR, 2,000 ms; TE, 30 ms; FOV, 200 × 200 mm; FA, 90°; and layer thickness = 4.32 mm. In parallel with the anterior commissure and posterior commissure, 33 slices of images were acquired at intervals covering the entire brain and the majority of the cerebellum. The scan matrix was 64 × 64 pixels, and the resolution was 3.4036 × 3.4036 × 4.3200 mm. This study also collected brain structure images of each participant to improve the image registration. A T1-weighted magnetization-prepared rapid gradient-echo sequence was employed, with the following scan parameters: TR = 1,900 ms, TE = 3.44 ms, and FA = 7°. This was a sagittal scan with an FOV of 256 × 256 mm and a pixel matrix of 192 × 256 pixels. There were 194 scanning layers, each layer was 1 mm thick, with no interval between layers. The resolution was 1 × 1 × 1 mm.