The DICOM reader, while reading your DICOM datasets will ensure this.<br><br><div class="gmail_quote">On Sun, Aug 23, 2009 at 10:34 PM, BalajiR <span dir="ltr"><<a href="mailto:r.balaji@siemens.com">r.balaji@siemens.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><br>
Hello All,<br>
<br>
In the ITK Software Guide (Section 8.3.2) , I read that it is absolutely<br>
critical to set the pixel size and the origin for the registration to be<br>
successful. The CT and PET image that Iam trying to register are also of<br>
different sizes and I think I need to set the pixel size and the origin<br>
properly. Both the CT and PET data in my case are DICOM files.<br>
<br>
Can you please let me know how I can set the pixel size and the origin ?<br>
<br>
Thanks for your help.<br>
<br>
Balaji<br>
<div class="im"><br>
<br>
BalajiR wrote:<br>
><br>
> Hello all,<br>
><br>
> I have started using ITK for solving a 3D image registration problem which<br>
> merges CT and PET images. I need your help in choosing the right algorithm<br>
> for my purpose.<br>
><br>
> From what I have gathered, Demons algo will only work with images (fixed<br>
> and moving) that have same intensities. Iam right now looking at<br>
> DeformableRegistration8.cxx that is part of the ITK examples. This<br>
> implements the B-Spline deformable registration and the comments indicate<br>
> that it can work for multi-modality registration which is exactly what Iam<br>
> trying to do. But when I execute it, it takes a long time to complete the<br>
> registration.<br>
><br>
</div><div class="im">> Can you please advice on which algo will be suitable and if possible the<br>
> reason behind the time taken by the B-Spline algo ?<br>
><br>
</div><div class="im">> Thanks for your help.<br>
><br>
> Regards,<br>
> Balaji<br>
><br>
<br>
--<br>
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