They are not exactly the same. However, if you run mri_vol2surf with --surf white50 --projfrac 0 it will be identical (where white50 is the surface create with mris_expand)
doug On 04/04/2014 05:34 AM, Righart, Ruthger wrote: > Hi Markus, > Thank you, excellent tool and gives exactly what I was searching for! > Is the resulting surface the same for mris_expand taken at 50% as the > one that is used in mri_vol2surf with flag projfrac 0.5? I wondered if > something is done differently as processing time for mris_expand is much > longer (at about 14 min.) as compared with mri_vol2surf (couple of > minutes). Any ideas on this would be welcome! > Ruthger > > Le 2014-04-03 16:39, Markus Gschwind a écrit : >> Hi Ruthger! >> >> Use mris_expand to create a surf inside or outside of white >> >> e.g. >> >> mris_expand surf/lh.white -1 surf/lh.white_1mm_inside >> # use positive values for outside ?h.white border >> >> mris_expand -thickness surf/lh.white -1 >> surf/lh.white_in100%_thickness >> # this samples in % of GM thickness, use positive values for outside >> white >> >> Cheers! >> Markus >> >> 2014-04-03 16:24 GMT+02:00 Righart, Ruthger >> <righ...@lrz.tu-muenchen.de>: >> >>> Hi All, >>> >>> mri_vol2surf has the flags --projfrac and --projdist. If I >>> understand >>> these flags correctly, the volume is sampled inbetween the >>> white-matter >>> surface and the pial surface (for ex. --projfrac 0.5 is midway). Is >>> there a possibility in tkmedit/Freeview to display with a colored >>> line >>> for ex. --projfrac 0.5 for a given subject? (actually similar to >>> what >>> was done by Salat et al., NeuroImage 2009, 48, p23, fig 1A, >>> http://surfer.nmr.mgh.harvard.edu/pub/articles/salat_2009.pdf [1]). >>> >>> Thank you very much in advance for your help! >>> >>> All the best, >>> >>> Ruthger >>> _______________________________________________ >>> Freesurfer mailing list >>> Freesurfer@nmr.mgh.harvard.edu >>> https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer [2] >>> >>> 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 [3] . 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. >> >> >> Links: >> ------ >> [1] http://surfer.nmr.mgh.harvard.edu/pub/articles/salat_2009.pdf >> [2] https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer >> [3] http://www.partners.org/complianceline >> >> _______________________________________________ >> 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 > > -- 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: 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 Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
