Prisma 3t mr scanner

All diffusion-weighted images were collected using echo planar imaging on a Siemens Prisma 3T MR scanner (Siemens Healthcare, Erlangen, Germany) with a repetition time (TR) = 9500 – 11400 ms; echo time (TE) = 82 – 88 ms; flip angle 90°; field-of-view (FOV) of 256 x 256 mm with an acquisition matrix of 128 x 128 for a voxel size of 2 mm x 2 mm x 2 mm. Diffusion weighting was distributed along 65 directions using b value sets of 0 s/mm² and 1000 s/mm². All subject space data was resampled to 1 mm isotropic resolution for analyses in standard space.
All functional MR images were collected on a Siemens Prisma 3T MR scanner (Siemens Healthcare, Erlangen, Germany) with a repetition time (TR) = 2000 ms; echo time (TE) = 28 ms; slice thickness of 4 mm with no interslice gap; field-of-view (FOV) of 220 mm with an acquisition matrix of 64x64 for an in-plane resolution of 3.4 mm, interleaved acquisition; flip angle of 90°; parallel imaging via CAIPIRINHA with a factor of 4; and multi-band acceleration with a factor of 3.
Additionally, a 1 mm 3D isotropic MPRAGE sequence was acquired for alignment with functional MRI data using standard acquisition parameters (TR = 2300 ms, TE = 2000 ms, inversion time (TI) = 900 ms, flip angle 9 – 15°, FOV = 240 x 320 mm and matrix size of 240 x 320, slice thickness = 1 mm).

All DSI data was collected on a Siemens Prisma 3T MR scanner (Siemens Healthcare, Erlangen, Germany) with a repetition time of (TR)=6.9–12.5sec, an echo time of (TE)=93msec, a flip angle of 90^o, and a field-of-view (FOV) of 245 × 245mm with an acquisition matrix of 160 × 160 for a voxel size of 1.5mm x 1.5mm x 2.5mm. A total of 61 samples were acquired with diffusion sensitizing gradients applied in two different acquisition schemes as summarized in Table 2. 19 patients underwent the first acquisition scheme with maximum b-value of 3000 s/mm², while 28 patients underwent the second acquisition scheme with maximum b-value of 2000 s/mm².