Dear Doug and Nick,

In my matlab code when I sum the area stored in ?h.white.avg.area.mgh I obtain an area of 82219 mm. Are these area values affected by the problem explained in http://surfer.nmr.mgh.harvard.edu/fswiki/GroupAverageSurface? Have I to multiply the values for 1.2? Nick, thank you for your idea but I'm writing a new program because I need a regions with the same area and (here is the difference) this new regions need to by a subregion of the originial freesurfer parcellation (for preserve the anatomical division).

Thank you for your response,

Rafa

2009/2/26 Nick Schmansky nicks@nmr.mgh.harvard.edu:

Rafa,

Not sure if this will help, but Bruce recently created a utility to generate a parcellation based on which icosahedral face each vertex maps to. Its called mris_make_face_parcellation, and you can get it here:

ftp://surfer.nmr.mgh.harvard.edu/pub/dist/freesurfer/misc/

ex.: cd <subj>/surf mris_make_face_parcellation \ lh.inflated \ $FREESURFER_HOME/lib/bem/ic3.tri \ lh.ic3.annot

then:

tksurfer <subj> lh inflated -annotation ic3

there are other 'ic' files in that bem dir to try, to give you different number of faces.

Nick

On Thu, 2009-02-26 at 11:39 +0100, Rafa x wrote:

...

Dear FS team,

I'm writing matlab code to obtain smaller parcellated regions of equal size starting from the freesurfer parcellation performed on the average subject. Should I apply a scale factor If I wanted to use the areas stored in ?h.white.avg.area.mgh for the new parcellation? My Freesurfer release is 4.2

Thanks in advance for your help.

Best, Rafa _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer