I'd collect highres T1w as well and then refine the 1mm surfaces using that.
Peace,
Matt.
From: SHAHIN NASR shahin@nmr.mgh.harvard.edu Date: Monday, February 25, 2013 1:39 PM To: Freesurfer freesurfer@nmr.mgh.harvard.edu, Bruce Fischl fischl@nmr.mgh.harvard.edu, Doug Greve greve@nmr.mgh.harvard.edu Subject: [Freesurfer] High resolution fMRI and resolution of anatomical scans
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