[Insight-users] Need help regarding registration techniques (ITK newbie :) )

[BalajiR]

Hello All,

In the ITK Software Guide (Section 8.3.2) , I read that it is absolutely
critical to set the pixel size and the origin for the registration to be
successful. The CT and PET image that Iam trying to register are also of
different sizes and I think I need to set the pixel size and the origin
properly. Both the CT and PET data in my case are DICOM files. 

Can you please let me know how I can set the pixel size and the origin ? 

Thanks for your help.

Balaji


BalajiR wrote:
> 
> Hello all,
> 
> I have started using ITK for solving a 3D image registration problem which
> merges CT and PET images. I need your help in choosing the right algorithm
> for my purpose. 
> 
> From what I have gathered, Demons algo will only work with images (fixed
> and moving) that have same intensities. Iam right now looking at
> DeformableRegistration8.cxx that is part of the ITK examples. This
> implements the B-Spline deformable registration and the comments indicate
> that it can work for multi-modality registration which is exactly what Iam
> trying to do. But when I execute it, it takes a long time to complete the
> registration.
> 
> Can you please advice on which algo will be suitable and if possible the
> reason behind the time taken by the B-Spline algo ?
> 
> Thanks for your help.
> 
> Regards,
> Balaji
> 

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