Hi,
We are planning to collect high resolution functional MRI for a group of subjects with voxel size smaller than 1 mm. For these subjects, we already have reconstructed anatomical scans with 1 mm voxel size. The question is, do we need to re-collect anatomical scans for these subjects with smaller voxel size (e.g. 0.5 x 0.5 x 0.5) or we can still use the old anatomical data for co-registration with freesurfer.

P.S.: We usually analyze our subjects in native space but technically we can do this in fsaverage space. So, we only need this co-registration for pre-processing and mapping fMRI data to fsaverage space.

Regards

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Shahin Nasr

PhD in Cognitive Neuroscience
Martinos Imaging Center, MGH
Harvard Medical School