A medial wall mask is used to mask out data for at least cifti files. It is hard to say for sure (the volume to surface mapping is more involved than the closest vertex logic used in the GUI to identify a vertex), but I would guess that both get masked out by the medial wall currently. Future registrations might make the edge of the medial wall mask closer to the location where the cortical sheet ends (but that won't affect your second question).
Tim On Mon, Feb 25, 2019 at 9:48 AM Moataz Assem <[email protected]> wrote: > Hi, > > > > I have got a couple of questions about surface segmentation for cortex > near the medial wall. I am attaching a couple of figs from structural data > we collected using the HCP protocols. > > > > 1) In fig1 attached, the cross hair (on volume) point to a part of > the cortical ribbon while its corresponding blue dot on the surface lies > “inside” the medial wall. Does that mean those voxels are excluded from > further analysis (i.e. are corresponding functional voxels excluded)? Or is > the medial wall there just for visual purposes. > > 2) In fig 2 attached, there appears to be a mistake in the lateral > ventricle where the choroid plexus (?) is misidentified as part of the > cortical ribbon. Again the blue spot on the surface is within the medial > wall. Would that mean this bit is excluded or will get “interpolated” > somewhere? > > > > Thanks > > > > Moataz > > _______________________________________________ > HCP-Users mailing list > [email protected] > http://lists.humanconnectome.org/mailman/listinfo/hcp-users > _______________________________________________ HCP-Users mailing list [email protected] http://lists.humanconnectome.org/mailman/listinfo/hcp-users
