Magnetom prisma 3t mr scanner

MRI data were acquired using a MAGNETOM Prisma 3T MR scanner (Siemens) with a 64-channel head–neck coil at the Centre for Mind/Brain Sciences, University of Trento. Functional images were acquired using the simultaneous multislices echoplanar imaging sequence, the scanning plane was parallel to the bicommissural plane, the phase encoding direction was from anterior to posterior, repetition time (TR) = 1000 ms, echo time (TE) = 28 ms, flip angle (FA) = 59°, field of view (FOV) = 200 mm × 200 mm, matrix size = 100 × 100, 65 axial slices, slices thickness (ST) = 2 mm, gap = 0.2 mm, voxel size = 2 × 2 × (2 + 0.2) mm, multiband factor = 5. Three-dimensional T1-weighted images were acquired using the magnetization-prepared rapid gradient-echo sequence, sagittal plane, TR = 2140 ms, TE = 2.9 ms, inversion time = 950 ms, FA = 12°, FOV = 288 mm × 288 mm, matrix size = 288 × 288, 208 continuous sagittal slices, ST = 1 mm, voxel size = 1 × 1 × 1 mm.

A MAGNETOM Prisma 3-T MR scanner (Siemens, Erlangen, Germany) was used to acquire MR images. Anatomical images were collected by T1-magnetization prepared rapid acquisition gradient echo [repetition time [TR] = 2,300 ms; echo time [TE] = 2.3 ms; flip angle [FA] = 8°; field of view [FOV] = 220 × 220 mm; voxel size = 1.0 × 1.0 × 1.0 mm; slice number = 192]. A T2-FLAIR (fluid-attenuated inversion recovery) sequence was applied to acquire tumor images (TR = 3,200 ms; TE = 87 ms; FA = 150°; FOV = 220 × 220 mm; voxel size = 0.9 × 0.9 × 5 mm; slice number = 25). Additionally, the parameters for the rs-fMRI sequence were as follows: TR = 2,000 ms; TE = 30 ms; FA = 75°; FOV = 220 × 220 mm; voxel size = 3.0 × 3.0 × 5.0 mm; slice number = 30; acquisition duration: 8 min. All MRI data were acquired within 72 h before tumor resection.

A MAGNETOM Prisma 3T MR scanner (Siemens, Erlangen, Germany) was used to acquire all image data. The parameters of MRI sequences (T1, FLAIR, and rs-fMRI) were as follows: T1 magnetization-prepared rapid acquisition gradient echo with gadolinium enhancement to acquire anatomical images, repetition time (TR): 2,300 ms; echo time (TE): 2.3 ms; field of view (FOV): 240 × 240 mm²; flip angle: 8°; slice number: 192; voxel size: 1.0 mm³ × 1.0 mm³ × 1.0 mm³; FLAIR sequence, TR: 5,000 ms; TE: 387 ms; FOV: 220 mm² × 220 mm²; flip angle: 150°; slice number: 128; thickness: 0.9 mm; voxel size in panel: 0.4 mm³ × 0.4 mm³ × 0.9 mm³; rs-fMRI sequence, TR: 2,000 ms; TE: 30 ms; FOV: 220 mm² × 220 mm²; flip angle: 90°; slice number: 30; voxel size in panel: 3.0 mm³ × 3.0 mm³ × 3.0 mm³, acquisition duration: 8 min.
Participants were asked to close their eyes without thinking about anything in particular during rs-fMRI acquisition.

A MAGNETOM Prisma 3T MR scanner (Siemens, Erlangen, Germany) was used to perform conventional MRI with the following scanning parameters. Anatomic images were collected with T1 (TR = 2300 ms, TE = 2.3 ms, flip angle = 8 o, field of view (FOV) = 240 × 240 mm, voxel size = 1.0 × 1.0 × 1.0 mm³, slice number = 192) and T2 (TR = 3200 ms; TE = 87 ms; FA = 150°; FOV = 220 × 220 mm; voxel size = 0.9 × 0.9 mm × 5 mm; slice number = 25). DTI data were acquired using a single shot, echo planar imaging sequence (TR = 6000 ms, TE = 103 ms, axial slices = 75, resolution = 2.0 × 2.0 × 2.0 mm, flip angle = 75°; FOV = 230 × 230 mm; voxel size = 2.0 × 2.0 × 2.0 mm, number of directions = 30, b = 0/1000 s/mm², EPI factor = 154).

MRI was performed with a MAGNETOM Prisma 3T MR scanner (Siemens, Erlangen, Germany). The T1 and T2 weighted image parameters were as follows: TR = 5800 ms, TE = 110 ms, flip angle = 150°, FOV = 230 × 230 mm, and voxel size = 0.6 × 0.6 × 5.0 mm³. The diffusion tensor images were acquired using a single shot, echo planar imaging sequence (axial slices = 75, resolution = 2.0 × 2.0 × 2.0 mm, TR = 6000 ms, TE = 103 ms, FOV = 230 × 230 mm, different directions = 30, b = 0/1000 s/mm², and EPI factor = 154).

A MAGNETOM Prisma 3T MR scanner (Siemens Healthcare, Erlangen, Germany) with a 64-channel head-neck coil was used for fMRI data acquisition at the Medical Imaging Center of our hospital. Earplugs and foam pads were used to minimize scanner noise and head motion. A medical tape was fixed on participants' foreheads to help them control their movements. rs-fMRI data were acquired using an echo-planar imaging sequence with 210 volumes lasting for 420 s. The corresponding acquisition parameters were set as follows: TR: 2,000 ms, echo time (TE): 30 ms, field of view (FOV): 224 mm × 224 mm, matrix size: 112 × 112, slices: 27, slice thickness: 4 mm, gap: 1 mm, and flip angle: 90°. High-resolution T1-weighted structural images were acquired with the following parameters: TR: 2,300 ms, TE: 2.27 ms, FOV: 250 mm × 250 mm, matrix size: 256 × 256, slices: 192, slice thickness: 1 mm, and flip angle: 8°.

MRI data were acquired using a MAGNETOM Prisma 3T MR scanner (Siemens) with a 64-channel head-neck coil at the Center for Mind/Brain Sciences, University of Trento. Functional images were acquired using the simultaneous multislices echoplanar imaging sequence: the scanning plane was parallel to the bicommissural plane, the phase encoding direction was from anterior to posterior, repetition time (TR) = 1000 ms, echo time (TE) = 28 ms, flip angle (FA) = 59°, multiband factor = 5. All participants in the early blind and sighted control groups and seven participants in the independent sighted group used a 3 mm spatial resolution: field of view (FOV) = 198 mm × 198 mm, matrix size = 66 × 66, 65 axial slices, slices thickness (ST) = 3 mm, gap = 0.3 mm, voxel size = 3 × 3 × (3 + 0.3) mm. The rest nine participants in the independent sighted group used a 2 mm spatial resolution: FOV = 200 mm × 200 mm, matrix size = 100 × 100, 65 axial slices, ST = 2 mm, gap = 0.2 mm, voxel size = 2 × 2 × (2 + 0.2) mm. Three-dimensional T1-weighted images were acquired using the magnetization-prepared rapid gradient-echo sequence, sagittal plane, TR = 2,140 ms, TE = 2.9 ms, inversion time = 950 ms, FA = 12°, FOV = 288 mm × 288 mm, matrix size = 288 × 288, 208 continuous sagittal slices, ST = 1 mm, voxel size = 1 × 1 × 1 mm.