[caret-users] regitering two surface

Donna Dierker donna at brainvis.wustl.edu
Wed Jun 20 07:58:23 CDT 2007

Hi Pedro,

Yes -- Caret does surface-based registration, as described in the 
registration tutorial:


If these two surfaces are from the same subject, then the core 6 
landmarks (the set typically recommended for inter-subject registration) 
will not achieve optimal registration; in that case, additional 
landmarks (e.g., STS, POS -- as many as you can reliably identify across 
timepoints) are recommended.

For each surface, you'll need to use Surface: Geometry: Generate 
inflated and ellipsoid from fiducial, to generate inputs the above 
tutorial expects.  You might also consider trying John's new method for 
registration without flattening:

login pub
password download

I haven't tried it myself yet.  I'm not sure whether your Caret version 
will include all the features you need to try this.

Finally, we tend to use the midthickness (fiducial) surface, rather than 
the WM/GM surface.  We generate a midthickness surface by averaging 
coordinates of Freesurfer-generated [lr]h.white and [lr]h.pial surfaces.


On 06/19/2007 04:48 PM, Pedro A. Valdes Hernandez wrote:
> Hi:
> I' completely new in this mailing list so maybe my question is a 
> little bit foolish
> I have two triangulated WM/GM surfaces, I'd like to know if I can find 
> corresponding anatomical points between them using CARET/SureFit...
> Thank you in advance
> Pedro
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