Hi all, I had asked a question on this forum a while ago related to medial wall structures in cifti and gifti files and I have a follow-up question.
I have been going through the gifti file format and have learned that the medial wall structures are labeled as ??? Unfortunately, it seems that most programmes do not output these vertex indices easily (or at least this is my impression). I tend to use the matlab gifti library by Guillaume Flandin (https://www.artefact.tk/software/matlab/gifti/) I need to know the medial wall indices in order to exclude them from some tractography seeds that I am generating. The way I have been retrieving these indices so far is: 1) locate the file ${side}.aparc.32k_fs_LR.label.gii in folder MNINonLinear/fsaverage_LR32k/ 2) load it in matlab > aparc = gifti('${side}.aparc.32k_fs_LR.label.gii'); 3) identify the data (aparc.cdata) that are associated with label ??? and store the indices My questions are: a) are these vertices standard across all of the brain? eg one participant has 2425 midline vertices. Should all HCP participants have the same vertices or do these differ slightly across subjects? b) can I just map these indices onto the T1 (32k resampled) vertices, in order to exclude these areas from my tractography? Regards, Claude ------------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------ Forschungszentrum Juelich GmbH 52425 Juelich Sitz der Gesellschaft: Juelich Eingetragen im Handelsregister des Amtsgerichts Dueren Nr. HR B 3498 Vorsitzender des Aufsichtsrats: MinDir Dr. Karl Eugen Huthmacher Geschaeftsfuehrung: Prof. Dr.-Ing. Wolfgang Marquardt (Vorsitzender), Karsten Beneke (stellv. Vorsitzender), Prof. Dr.-Ing. Harald Bolt, Prof. Dr. Sebastian M. Schmidt ------------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------ _______________________________________________ HCP-Users mailing list HCP-Users@humanconnectome.org http://lists.humanconnectome.org/mailman/listinfo/hcp-users
