Hi Bruce, Thanks for your reply. This makes sense. One remaining question is which surface is used to compute the eigen-axis, is it the white surface?
Best, Martin On 02/03/14 15:27, Bruce Fischl wrote: > Hi Christian and Martin > > mris_divide_parcellation finds the primary eigen-axis of the > parcellation along the cortical surface, then splits it up into as many > units as specified (either enough to get it under the area threshold, or > explicitly specifed in a split file) > > cheers > Bruce > > p.s. the code is open source so you are always welcome to grab it and > take a look > > On Mon, 3 Feb 2014, Martin Luessi wrote: > >> I'm wondering about this as well. It would be great if someone who is >> familiar with the FreeSurfer code could explain the split algorithm. >> >> Best, >> >> Martin >> >> >> On 01/29/14 14:36, Christian Brodbeck wrote: >>> Dear Freesurfer developers, >>> >>> I am trying to replicate mris_divide_parcellation for mne-python >>> (https://github.com/mne-tools/mne-python/pull/1085). I think I am >>> doing the same as the MRISdivideAnnotationUnit function >>> (https://github.com/neurodebian/freesurfer/blob/master/utils/annotation.c#L473), >>> but the result still looks different. Could someone point out how >>> exactly the split is done, and if there are any steps in addition to >>> the function? Are there any measures that are taken when the split >>> would result in two disconnected regions belonging to the same label? >>> And what surface is the split performed on (I would assume that would >>> be “white”)? >>> >>> Thank you! >>> >>> Christian >>> _______________________________________________ >>> 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 >> >> >> -- Martin Luessi, Ph.D. Research Fellow Department of Radiology Athinoula A. Martinos Center for Biomedical Imaging Massachusetts General Hospital Harvard Medical School 149 13th Street Charlestown, MA 02129 Fax: +1 617 726-7422 _______________________________________________ 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.
