do you mean noise in the surface placement or in the parcellation labels? On Wed, 29 Jul 2009, Stephen Tyree wrote:
> Rahul, thanks for the ref to the atlas definitions. Is there a similar > definition for the cortex mask (?h.cortex.label)? > > Bruce, yes we are using the latest version. Some of our surfaces seem to > exhibit a lot of noise between the anterior cingulate and the corpus > callosum, sometimes encroaching on the ac. We are trying to determine if > manual editing of the surfaces will improve that region sufficiently to > justify the time spent and the introduction of human bias to surface > reconstruction. Any advice? > > -- > Stephen Tyree > Neuroimaging Computer Scientist > Laureate Institute for Brain Research > Tulsa, OK, USA > > > On Tue, Jul 28, 2009 at 6:20 PM, Bruce Fischl > <fis...@nmr.mgh.harvard.edu>wrote: > >> sure, you could edit it. You'll want to look at the volume as well. What >> version are you using? I think we improved this sometime in the past year >> (using the improved callosum labels) >> >> cheers >> Bruce >> >> >> >> On Tue, 28 Jul 2009 ra...@nmr.mgh.harvard.edu wrote: >> >> Hi Stephen, >>> >>> For the ?h.aparc.annot atlas, the boundary definitions are included in the >>> Desikan et al., 2006 paper (Neuroimage). >>> >>> Best, >>> >>> Rahul >>> >>> One of the regions we are investigating using a surface-based analysis is >>>> the anterior cingulate. In some of our surface reconstructions, parts of >>>> this region are excluded from the ?h.cortex.label files. What are the >>>> criteria that Freesurfer uses to determine those boundaries? Could >>>> manual >>>> editing around the boundary reliably extend the usable surface in that >>>> area? Thanks. >>>> >>>> -- >>>> Stephen Tyree >>>> Neuroimaging Computer Scientist >>>> Laureate Institute for Brain Research >>>> Tulsa, OK, USA >>>> _______________________________________________ >>>> 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
