No, I don't have any examples (although we haven't been looking either). However, Martin's email regarding problems he is encountering on the LGI computation seems premised on having surfaces with topological problems even under v4 -- hence my question.... Am I mis-reading your situation Martin?
thanks, Mike H. On Mon, 2008-06-09 at 15:03 -0400, Bruce Fischl wrote: > Hi Mike, > > I think it is the case. Sorry, I haven't been following this thread. Do > you find situations in which the corrected surfaces have the wrong > topology? > > Bruce > > > On Mon, 9 Jun 2008, Michael Harms wrote: > > > > > Hello, > > Here is a related question prompted by this thread, perhaps based on a > > misconception on my part: > > > > I was under the impression that you are guaranteed to get surfaces with > > an euler number of 2 under the "new" topology fixer of version 4 (which > > runs by default if the "old" fixer does not initially yield surfaces > > with an euler number of 2). > > > > Is that not in fact the case? > > > > thanks for clarifying, > > Mike H. > > > > On Mon, 2008-06-09 at 20:32 +0200, Martin Kavec wrote: > >> Hi Maria, > >> > >> On Monday 09 June 2008 15:00:10 Marie Schaer wrote: > >>> Martin, > >>> > >>> Which version of freesurfer did you use to generate the surfaces? > >> > >> with the latest one, 4.0.4 > >> > >>> Because the number of topological defects in your surface (64) is very > >>> high. You may have to relaunch the surfaces (orig and pial) to get > >>> better surfaces (i.e. 0 defect). > >> > >> Thanks, I'll do that! > >> > >>> > >>> Lgi often fail if there are defects, sometimes it will pass if you > >>> relaunch it, but if there are numerous defects the algorithm is not > >>> able to cope with it. > >> > >> That's a nice check whether there are still any topological defects left. > >> As > >> you say, in more than 50% of my cases LGI fails. > >> > >> Thanks, > >> > >> Martin > >> _______________________________________________ > >> Freesurfer mailing list > >> 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 > > > > > > _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
