That is not possible. If you mask out everything you don't want, you can run it with --projfrac-max to get the maximum along the normal. Since stuff out of the ribbon is 0, it will give you stuff in the ribbon. This is a little messy though because it won't necessarily give you the point closest to the missing data point (and the max is just a messy measure). doug
On 06/01/2012 01:39 PM, Kathryn I. Alpert wrote: > Hi Doug, > > I was wondering if it was possible to have the intensity at the > nearest non-zero voxel projected onto the vertex. > > Perhaps if we use --projfrac 0.5, mri_vol2surf will select mostly GM > voxels, which is our goal. > > Thanks, > Kate > > On 06/01/2012 12:47 PM, Douglas N Greve wrote: > > >What do you mean ignore? If you mask them out of the volume so that they > >are 0 (or -999), then they will be 0 or -999 in the output. > >doug > > > >On 06/01/2012 12:25 PM, Derin J Cobia wrote: > >> Bump. > >> > >> I'm interested in the answer to this question as well. Doug/Bruce, do > >> you know? > >> > >> -Derin > >> > >> > >> On May 29, 2012, at 8:43 PM, Kathryn I. Alpert wrote: > >> > >>> Dear Freesufer experts, > >>> > >>> I am wondering if it is possible to tell mri_vol2surf to ignore > >>> certain voxels in the src volume, for instance, by setting their > >>> intensity to -999. > >>> I'm trying to project only gray matter voxels from a PET scan onto > >>> the fsaverage surface, but when I use an only-GM PET image as the > >>> src, the zeroed-out WM/CSF voxels are occasionally projected onto the > >>> surface (with --interp nearest). > >>> Any suggestions? > >>> > >>> Thanks! > >>> Kate > >>> _______________________________________________ > >>> Freesurfer mailing list > >>> Freesurfer@nmr.mgh.harvard.edu > <mailto:Freesurfer@nmr.mgh.harvard.edu> > <mailto:Freesurfer@nmr.mgh.harvard.edu > <mailto: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 <mailto:Freesurfer@nmr.mgh.harvard.edu> > >> https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer > > > >-- > >Douglas N. Greve, Ph.D. > >MGH-NMR Center > >gr...@nmr.mgh.harvard.edu <mailto:gr...@nmr.mgh.harvard.edu> > >Phone Number: 617-724-2358 > >Fax: 617-726-7422 > > > >Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting > <http://surfer.nmr.mgh.harvard.edu/fswiki/BugReporting> > >FileDrop: www.nmr.mgh.harvard.edu/facility/filedrop/index.html > <http://www.nmr.mgh.harvard.edu/facility/filedrop/index.html> > > > >_______________________________________________ > >Freesurfer mailing list > >Freesurfer@nmr.mgh.harvard.edu <mailto: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 -- Douglas N. Greve, Ph.D. MGH-NMR Center gr...@nmr.mgh.harvard.edu Phone Number: 617-724-2358 Fax: 617-726-7422 Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting FileDrop: www.nmr.mgh.harvard.edu/facility/filedrop/index.html _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
