1.5 avanto system

Five participants were scanned using a Siemens 1.5 Tesla Sonata system, with the following parameters: DTI: repetition time (TR)=9000 ms echo time (TE)=68 ms, 60 slices total, acquisition matrix=128 × 128 (field of view; FOV=256 × 256 mm), slice thickness=2 mm (for 2 mm isotropic voxels) with 0 mm gap, with a b value=700 s/mm², 10 T2 and 60 diffusion weighted images, and one image, the T2-weighted “low b” image with a b-value=0 s/mm² as an anatomical reference volume. The remaining 105 participants were scanned on the upgraded Siemens 1.5 Avanto System, with slightly different parameters: DTI: repetition time (TR)=7200 ms echo time (TE)=77 ms, 60 slices total, acquisition matrix=128 × 128 (field of view; FOV=256 × 256 mm), slice thickness=2 mm (for 2 mm isotropic voxels) with 0 mm gap, with a b value=700 s/mm², 10 T2 and 60 diffusion weighted images, and one image, the T2-weighted “low b” image with a b-value=0 s/mm² as an anatomical reference volume.

Four participants were scanned using a Siemens 1.5 Tesla Sonata system, with the following parameters: MPRAGE; T1=1000 ms, TR=2.73 sec, TE=3.39 ms, flip angle=7°, slice thickness=1.33 mm, 128 slices, FOV=256x256 mm. The remaining 103 participants were scanned on the upgraded Siemens 1.5 Avanto System, with slightly different parameters; MPRAGE: T1=1000 ms, TR=2.73 sec, TE=3.31 ms, flip angle=7°, slice thickness=1.3 mm, 128 slices, FOV=256x256 mm.