The trouble with highly anisotropic resolutions is that your resolution is only as good as your worst axis for the convoluted cerebral cortex. 0.8mm or better would be optimal given a minimum cortical thickness of 1.6mm.
You can always try with what you have and see if it is net beneficial or not. Peace, Matt. On 2/28/18, 12:40 PM, "freesurfer-boun...@nmr.mgh.harvard.edu on behalf of Christopher Markiewicz" <freesurfer-boun...@nmr.mgh.harvard.edu on behalf of markiew...@stanford.edu> wrote: >Hi all, > >I wonder if people have any data (or anecdotes - I'm not picky) with >regard to how high of resolution T2w or FLAIR images need to be in order >to be useful for FreeSurfer's pial refinement. I've seen a couple threads >suggesting the optimal is ~1mm isotropic, and that thick slice (1x1x5 >mm^3) FLAIR images could be tried, but might hurt more than help, and I'm >wondering if there's a suboptimal-but-still-useful range somewhere in >between. > >For the record, this isn't a question of what scan parameters are >recommended, but rather is in the context of data that's already been >collected, which I would like to preprocess as well as possible. > >So, at what resolutions would you recommend (a) completely ignoring >T2w/FLAIR images; (b) including T2w/FLAIR images that pass QC; (c) trying >and seeing? Do these answers change at all with T1w resolution? > >-- >Chris Markiewicz >Center for Reproducible Neuroscience >Stanford University > > >_______________________________________________ >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. > _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
