Dear Doug and all, I have already done two things: (1) 'recon-all? to
the segmentation for 140 subjects; (2) surface registration to
fsaverage template for 1 subject using: mri_surf2surf --hemi lh
--srcsubject sub001 --srcsurfval thickness --src_type curv
--trgsubject fsaverage --trgsurfval ./sub001-thickness-lh.mgz Now I
have got the 'sub001-thickness-lh.mgz' file. I have two questions: (1)
Is this 'sub001-thickness-lh.mgz? a surface file or a volume file? How
can I read it? I used ?freeview sub001-thickness-lh.mgz? to read it,
but a dark scene was shown, nothing can be found. I also used
?mris_convert -c $SUBJECTS_DIR/sub001/sub001-thickness-lh.mgz
$SUBJECTS_DIR/sub001/surf/lh.orig lh.thickness.asc?, an error occurred
like ?ERROR: number of vertices in
/disk250/data_analysis/sub001/sub001-thickness-lh.mgz does not match
surface (163842, 132230)?. 

(2) After the registration, I want to flatten the surface of curvature
or thickness into a full plane. The wiki says we should first specify
5 vertices and cut the whole area without the midline region, then
?kris_flatten? can be used. Indeed, this procedure requires quite a
lot manually operation. I am wondering if there are some automatically
commands that can do this flatten projects for 140 subject? Any reply
would be really appreciated! Qiongmin
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