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I'm trying to make a surface file from a subject's head and to map coordinates to that surface.  If I run:


mri_seghead --invol $SUBJECTS_DIR/$sub/mri/T1.mgz --outvol $SUBJECTS_DIR/$sub/mri/seghead.mgz --fill 255 --thresh1 20 --thresh2 20 --nhitsmin 2

mri_tessellate $SUBJECTS_DIR/$sub/mri/seghead.mgz 255 $SUBJECTS_DIR/$sub/surf/lh.seghead

and then load lh.seghead in FreeView, it looks as I would expect.  Clicking anywhere near a vertex gives the typical output, showing the closest vertex.  All fine and well.  However, if I load the file in Matlab:


vCoord=read_surf('$SUBJECTS_DIR/$sub/surf/lh.seghead');


my values are nothing near what I'm seeing in Freeview.  For example, FreeView reports:


vertex 234741 [-78.50,14.50,26.50]


read_surf reports:


vertex 234740 0 168.980000000000 0

Of note, an error log tells me that:

MRISreadNewCurvature: incompatible vertex number in file $SUBJECTS_DIR/$sub/surf/lh.curv


How do I edit, update or create a curv file to play with the new surface file, or what can I do to get sensical surface coordinates from this data?

Thanks,
Joel








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