Magnetom avanto mri

Morphological analyses were performed on high‐resolution three‐dimensional T1w MPRAGE images acquired in sagittal plane (TR/TI/TE = 2080/1100/3.0 ms; α = 15°, 160 slices, voxel size: 0.98 × 0.98 × 1 mm). Additionally, a double spin echo proton density‐weighted (PD)/T2‐weighted sequence was acquired (TR/TE1/TE2 = 3980/14/108 ms; flip angle = 180°, 40 slices, 3 mm slice thickness without gap with an in‐plane resolution of 1mm²). All MRI scans were performed on a 1.5 Tesla Magnetom Avanto MRI‐scanner (Siemens Medical Solutions, Erlangen, Germany).

The MRI protocol consisted of structural and functional images acquired on a 1.5 T Siemens Magnetom Avanto MRI scanner. Image acquisition was as follows: high-resolution T1-weighted anatomic images were obtained (TR = 1900 ms, TI = 1000 ms, TE = 2.8 ms, flip angle = 8°, 144 contiguous slices of 1.0 mm thickness, FOV = 256 × 256 mm², and matrix = 256 × 256). T2-weighted images were obtained (TR = 4000 ms, TE = 79 ms, thickness = 5.5 mm, flip angle = 150°, FOV = 230 × 230 mm², and matrix = 231 × 384). SWI images were obtained (TR = 49 ms, TE = 40 ms, flip angle = 15°, 72 contiguous slices of 2.0 mm thickness, FOV = 230 × 230 mm², and matrix = 221 × 320). DTI scans were obtained (TR = 7300 ms, TE = 99 ms, thickness = 3 mm, directions = 30, FOV = 256 × 256 mm², matrix = 128 × 128, Averages = 2, and b-value = 1,000/0 s/mm²).

All scans were acquired on the same 1.5T Magnetom Avanto MRI scanner (Siemens, Erlangen, Germany) with a 12-channel head and neck coil. The imaging system did not undergo any major hard- or software upgrades during the study. A diffusion-weighted echo-planar imaging sequence was acquired for all study participants with 64 non-collinear directions with b-value = 1500 s/mm² and 2 volumes with b-value = 0 s/mm² (repetition time = 7800 ms, echo time = 109 ms, matrix = 102×102×46, resolution = 2.5 mm³ isotropic, phase encoding = anterior–posterior). In addition, an additional image with b-value = 0 s/mm² was acquired with the exact same parameters except for phase encoding = posterior–anterior.