Hi Karen

I guess I would do it in matlab - load the face parcellation and the aparc.annot, then count the number of vertices in each parcel in the face parcellation that is in a non-cortical aparc.annot parcel, and set a threshold for discarding them.

cheers
Bruce


On Wed, 2 Apr 2014, Karen Marie Sandø Ambrosen wrote:

Hi Bruce,

How can I remove the non-cortical parcels from the annotation file created
by mris_make_face_parcellation, such that I obtain an annotation file with
approx. the same number of parcels as ?h.aparc.annot.

Best,
Karen

On 04/01/2014 02:05 PM, Bruce Fischl wrote:
      Hi Karen

      sorry, I don't think so. You could certainly discard parcels
      that have a substantial non-cortical component to them, but
      parcellating the remainder of the surface uniformly isn't
      trivial.

      cheers
      Bruce
      On Tue, 1 Apr 2014, Karen Marie Sandø Ambrosen wrote:

            Hi Freesurfer experts,

            I first parcellated the ?h.aparc.annot using the
            mris_divide_parcellation and at first glance it
            seems fine. However, I
            experienced that the size of the regions varies a
            lot. I then found the
            mris_make_face_parcellation, that parcellate the
            surface in regions of
            more equal sizes. Unfortunately the
            mris_make_face_parcallation uses the
            whole surface including the medial wall. Is there
            any way I can get rid
            of the labels covering the medial wall and obtain a
            parcellation with
            the same number of vertices as ?h.apac.annot, but
            with regions of equal
            size?

            Best,
            Karen
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