Verio tim system

Patients and controls underwent the same high-resolution T1-weighted structural MRI acquisition on a Siemens 3 Tesla VERIO TIM system that was equipped with a 32-channel head coil. A three-dimensional MPRAGE dataset that covered the whole brain was acquired for each participant across 176 axial slices with a voxel isometric resolution of 1 mm 3 (TE = 2.98 msec, TR = 2300 msec, and flip angle = 9°). MRI and behavioural testing took place on the same day for most of the participants or a few days apart at most. was combined with lesion masking to limit the impact of a brain lesion on the spatial normalization (Crinion et al., 2007; Andersen et al., 2010) . This approach has been identified as the best compromise between the normalization accuracy and lesion shrinkage in a recent study (Ripollés et al., 2012) . The segmentation parameters were set to the defaults, except for regularization, which was set to medium (Andersen et al., 2010; Ripollés et al., 2012) .

The subjects underwent a high-resolution T1-weighted structural MRI on a Siemens 3-Tesla VERIO TIM system equipped with a 32-channel head coil. An axial 3-dimensional MPRAGE dataset covering the whole head was acquired for each participant with the following parameters: 176 slices, voxel resolution = 1 × 1 × 1 mm, TE = 2.98 ms, TR = 2300 ms, and flip angle = 9°.