You actually should not need to do any transformation, just render the
sig map directly in tksurfer, ie,
tksurfer fsaverage lh inflated -overlay sig-lh.bhdr
fsaverage is the sphere (7th order icosahedron).
raij@nmr.mgh.harvard.edu wrote:
Hi,
I would like to paint group analysis results to the surface of the
fsaverage brain to produce .w files.
With individual subject analyses (that were calculated in individual
space, i.e. not morphed), I have been able to use mri_vol2surf in this
manner:
mri_vol2surf --src V-REST/sig --src_type bfloat -srcreg ../register.dat
--hemi lh --o ./V-REST-lh.w --out_type paint
In the group analysis, the individual subjects' volumes were morphed into
sperical space where the spatial alignment across subjects was done. I
used the average brain "fsaverage" as the target brain. Here the above
mri_vol2surf will not work.
I am unsure how to do the corresponding paint job for the morphed group
analysis data. Would the following command do what needs to be done?
mri_surf2surf --srcsubject fsaverage --trgsubject fsaverage --srcsurfval
V-REST/sig-lh --src_type bfloat --hemi lh --trgsurfval ./V-REST-lh.w
--trg_type paint
Thanks,
Tommi
---
Tommi Raij, M.D., Ph.D.
MGH/MIT/HMS Athinoula A. Martinos Center for Biomedical Imaging
Bldg 149, 13th St
Charlestown, MA 02129
U.S.A.
raij@nmr.mgh.harvard.edu
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