I would add that my guess is the FLAIR is helpful up to about 1.25-1.5mm thickest dimension
cheers Bruce On Wed, 28 Feb 2018, Glasser, Matthew wrote: > 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 > > > _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
