Hi Frederick,
mri_info will give you the various transformations back to native (i.e.
scanner) RAS coords.
cheers,
Bruce
On Tue, 29 Aug 2006, Frederick Klauschen wrote:
Could you tell me the transformation vector that is
used to convert a e.g.(181x217x181) array to a FS
(256^3) array.
I would like to backtransform from FS to native space.
Thanks,
Fred
--- Doug Greve <[EMAIL PROTECTED]> wrote:
Which way do you want to go? Convert FS volumes back
into the native
space or the other way around?
To convert native space vols into FS, run something
like:
tkregister2 --s subjectname --mov mri/orig/001.mgz
--regheader --reg reg.dat
This will bring up both the conformed and nonconf
volumes, and there
should be an exact registration. Once you're
confidient of that, you can
add --noedit in which case it will simply produce
reg.dat without
bringing up the gui.
Then you can run
mri_vol2vol --mov anynativevolume --fstarg --o
anynativevolume.inconformedspace.mgz
The new volume will be in the conformed (orig.mgz)
space.
doug
Goldman, Aaron (NIH/NIMH) [C] wrote:
Hi, I have a few datasets I ran in freesurfer that
were originally in
181x217x181 format. As usual, these were converted
to 256^3 early in the
process. Basically, I'd like to run some comparison
stats between the
freesurfer volumes and the same subjects run in a
couple other programs
(that are still 181x217x181), and was wondering
what the best way would
be to reobtain an exact overlay between the two.
Thanks,
-Aaron-
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--
Douglas N. Greve, Ph.D.
MGH-NMR Center
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Phone Number: 617-724-2358
Fax: 617-726-7422
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