You do not need another one unless you think that the brain has changed in some way between when you collected the anat and the func. Also, if you are going to acquire a partial field of view (ie, only part of the brain), make sure you get a full brain acq of something to help in registration (--int flag with BBR). This can really be anything, eg, a single time point from a "normal" resolution fMRI, but it could also be an anatomical if you wanted to collect that. doug
On 02/25/2013 02:39 PM, SHAHIN NASR wrote: > 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 > > > -- > Shahin Nasr > > PhD in Cognitive Neuroscience > Martinos Imaging Center, MGH > Harvard Medical School -- Douglas N. Greve, Ph.D. MGH-NMR Center gr...@nmr.mgh.harvard.edu Phone Number: 617-724-2358 Fax: 617-726-7422 Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting FileDrop: www.nmr.mgh.harvard.edu/facility/filedrop/index.html Outgoing: ftp://surfer.nmr.mgh.harvard.edu/transfer/outgoing/flat/greve/ _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer The information in this e-mail is intended only for the person to whom it is addressed. If you believe this e-mail was sent to you in error and the e-mail contains patient information, please contact the Partners Compliance HelpLine at http://www.partners.org/complianceline . If the e-mail was sent to you in error but does not contain patient information, please contact the sender and properly dispose of the e-mail.
