[Insight-users] Validation of deformable registration

[Marta]

Hi,

I try to validate my deformable registration method and I do already  
know that there is no standard for it.
Anyway, I found in older posts a way to do it by generating an  
artificially deformation field and compare it with the result  
deformation field.
Luis told (e.g.) so in http://www.itk.org/pipermail/insight-users/2006-July/018634.html 
:

"The common approach is to artificially generate a
deformation field by using ThinPlateSplines, use this artificial  
deformation field in order to create a deformed version of your image.
Then use your registration method between the original and the  
deformed image, and finally compare the artificial deformation field  
against the one that
you produced with the registration method."

However, I'm not sure what is the best way to compare the deformation  
fields. Can I also use a squared image difference?
Or are there any better ways?

Would be happy for any suggestions!

Best regards,
Marta