The label file has much less info than the surface file (eg, does not have neighborhood relations). mri_label2vol requires that a full surface file be provided. It might not be obvious because it usually finds the surface based on the subject name.
On 7/25/19 3:29 PM, Sam W. wrote: > > External Email - Use Caution > > Thanks Bruce, that's helpful! I take it that it's not possible to > create a surface file simply using the information in the label file then? > The reason I'm confused is that "mris_convert lh.white lh.white.asc" > will convert a surface file to asc. The contents of lh.white.asc look > similar to what a label file contains, so I thought you could easily > convert a label into a surface and vice versa. > Also, if the label does not contain information about topology, how > are we able to convert a label to a volume with mri_label2vol? > Thanks in advance! > Sam > > On Wed, Jul 24, 2019 at 10:42 PM Bruce Fischl > <fis...@nmr.mgh.harvard.edu <mailto:fis...@nmr.mgh.harvard.edu>> wrote: > > Hi Sam > > they are not the same. A label is just a list of vertices in the > surface > (with some possibly voxel coordinates and also with a single > value/vertex). > It doesn't have to be ever vertex in the surface, and also > contains no > information about topology (e.g. which vertices are connected by > an edge) > > cheers > Bruce > > > On Wed, 24 Jul 2019, Sam W. wrote: > > > > > External Email - Use Caution > > > > Thanks Bruce. Can I ask you a very basic question? What exactly > is the > > difference between a surface and a label file? I thought the > difference was > > that the label file is just a normal text file containing the > vertices that > > are used to construct a surface. If so, is there a tool that > allows me to > > create a surface from a label file? mri_label2surf would be my > first guess, > > but that doesn't seem to exist. > > Best regards, > > Sam > > > > > > On Wed, Jul 24, 2019 at 4:18 PM Bruce Fischl > <fis...@nmr.mgh.harvard.edu <mailto:fis...@nmr.mgh.harvard.edu>> > > wrote: > > Hi Sam > > > > the labels are already ascii > > > > cheers > > Bruce > > On Tue, 23 Jul 2019, Sam W. wrote: > > > > > > > > External Email - Use Caution > > > > > > Hi, > > > > > > Is it possible to convert a label file like rh.cuneus.label > > into asc? I > > > tried > > > mris_convert --label rh.cuneus.label ctx-rh-cuneus rh.white > > rh.cuneus.asc > > > > > > but got an error: > > > > > > ERROR: unknown file annot file type specified for output: > > rh.cuneus.asc > > > > > > Thanks! > > > Sam > > > > > > > > >_______________________________________________ > > 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 <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 _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
