Hi Sean
I think using mris_expand with a negative number is the better way to do this. Then use the resulting surface for the seed. It should prevent the surface from passing through itself (which is what you are seeing)
cheers Bruce
On Mon, 9 Sep 2013, Sean Hatton wrote:
Hello FS Gurus,
I would like to export FS labels as seed regions for deterministic tractography in TrackVis (probabilistic is not appropriate in this investigation). I run mri_label2vol with ?--proj abs -4 0 .1? to try and grow the label into the WM and exclude GM. While I get a biologically plausible ROIs and plenty of good streamlines, I do get some stray streamlines that jump across the sulci into adjacent gyri which (I have read) is an artefact of seeding from GM. Have I got the right approach? Should I create an inverse intracranial volume mask as an exclusion mask? Something else?
Kind regards,
Sean Hatton Brain & Mind Research Institute University of Sydney, Australia. _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer