Dear Donald, dear All,
the surfaces are been extracted with deformable models.
Actually I didn?t register the surfaces "directly" with SPM5 but
using somehow it. What I tried to do is :
to register MRIs to a template with SPM5,
to save the affine transformation parameters and after that
to apply those transformation parameters to the surfaces (extracted from the
non registered MRIs).
But as I told something went wrong.
I?m considering your suggestions (CARET , Freesurfer ).
Thanks
Best Regards,
Antonietta
How did you extract the surfaces?
How did you register surfaces in SPM?
If you are going through the trouble of creating surfaces, I'd recommend a
non-linear transform to the atlas. Essentially register your surface to a
surface of an atlas. This can be done with CARET (brainmap.wustl.edu) or
Freesurfer (Boston University).
On Feb 13, 2008 12:40 PM, Antonietta Pepe <[log in to unmask]> wrote:
[Hide Quoted Text]
> Dear SPMers,
>
> I?m a new SPM5 user.
>
> My goal is to register with affine transformation a group of
> hemispheric SURFACES extracted from MRIs.
>
> I did the following:
> (1) I used SPM5 ("Normalise :Estimate& Write"from the GUI)to register each
> MRI
> volumes to the T1 template;
> (2) I have extracted hemispheric surfaces from each non registered MRI in
> (1);
> (3) I have applied to each surface extracted in (2) the correspondent
> transformation parameters obtained in (1).
>
> My doubts are the following:
> a) I noticed that the transformation parameters in the *sn files are
> slightly
> different from what I can read from the GUI and I do not know which are
> the
> right ones;
> b) I realized that the so transformed surfaces (with both the
> transformation
> parameters)are spatially spread all around and so something went wrong
> but I do not know where.
>
> Any comment/hint/idea would be highly appreciate.
>
> Best Regards,
> Antonietta Pepe
>
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