Hi Glen, if it is just a slab, you are probably smoothing in a bunch of 0s. Try smoothing only the areas within a mask of the slab. You can do this by passing a label to mri_surf2surf ( you can also create a mask and pass it to mris_fwhm). doug On 05/13/2013 10:12 AM, Glen Lee wrote: > Inline image 3Dear freesurfer expert > > I've tried both relatively small and large size of smoothing kernel > (i.e., 4mm vs. 10mm) on the surface EPI data using > mri_surf2surf function (e.g., mri_surf2surf --hemi lh --s > fsaverage_sym --fwhm ) > > Attached are displays of raw EPI, 4mm, and 10 mm FWHM. > As can be seen, the areas being smoothed by 10mm FWHM is quite off > from those in the raw 2D EPI whereas 4mm result looks reasonable. > > > If anyone has some intuition about why this happened, please help me. > -Glen > ps) the area with colors show vertices with non-zeros values (also it > was reconstructed from slap EPI) > > > _______________________________________________ > Freesurfer mailing list > Freesurfer@nmr.mgh.harvard.edu > https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
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