you can sample under the wm surface by using negative proj fracts or proj dists doug
On 09/03/2013 09:32 AM, Robert Schulz wrote: > Dear Freesurfers, > I transferred the white matter binary mask (derived from aseg, volume) > to FSL and performed probabilistic tractography in it. > Now I'd like to project the 'outer' white matter results (vol) onto > the white surface. > To test for the acuracy of this approach, I tried to project the white > matter mask (binarized, volume) itself on the surface, proper > projection should give only 1s (ones) on the surface, which holds true > for the majority of vertices. > I used the following command: mri_vol2surf --mov whitevolume.mgz --reg > struct2freesurfer.dat --projdist-max 0 3 0.1 --interp nearest --hemi > rh --out ... > Is there a way to optimize this? The binarized white matter data > (volume) is just below the white matter surface in most cases, > sometimes, voxels are also above the surface. > If I try trilinear I get values far away from 1 (hence values which > are not included in the primary data (=binarized mask). > Looking forward to your suggestions. > Thank you very much, > Best > Robert > > Besuchen Sie uns auf: www.uke.de <http://www.uke.de> > > ------------------------------------------------------------------------ > > Universitätsklinikum Hamburg-Eppendorf; Körperschaft des öffentlichen > Rechts; Gerichtsstand: Hamburg > Vorstandsmitglieder: Prof. Dr. Martin Zeitz (Vorsitzender), Prof. Dr. > Dr. Uwe Koch-Gromus, Joachim Prölß, Rainer Schoppik > > ------------------------------------------------------------------------ > > SAVE PAPER - THINK BEFORE PRINTING > > > > _______________________________________________ > Freesurfer mailing list > [email protected] > https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer -- Douglas N. Greve, Ph.D. MGH-NMR Center [email protected] Phone Number: 617-724-2358 Fax: 617-726-7422 Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting FileDrop: https://gate.nmr.mgh.harvard.edu/filedrop2 www.nmr.mgh.harvard.edu/facility/filedrop/index.html Outgoing: ftp://surfer.nmr.mgh.harvard.edu/transfer/outgoing/flat/greve/ _______________________________________________ Freesurfer mailing list [email protected] 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.
