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<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">Hallo,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">I forward again my previous email hoping for a reply.
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">Within the context of intensity based 2D-3D registration, can RayCastInterpolateImageFunction be used with ImageRegistrationMethodv4, as the other interpolators listed in the manual? RayCastInterpolateImageFunction
is not in the manual as the other interpolators: does this mean that has not been implemented for use with ImageRegistrationMethodv4 (given that my code does not seem to work)?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">The problem why my code does not work is apparently not a memory issue (I tried with a very very small 3D volume and the registration still does not work).<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">Thank you!</span><span lang="EN-US" style="color:#1F497D;mso-fareast-language:DE-CH"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="mso-fareast-language:DE-CH">From:</span></b><span lang="EN-US" style="mso-fareast-language:DE-CH"> D'Isidoro Fabio
<br>
<b>Sent:</b> Freitag, 11. November 2016 13:37<br>
<b>To:</b> insight-users@itk.org<br>
<b>Subject:</b> intensity based 2d 3d registration<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Hallo,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I work on itk V4.10 (latest version) with Python wrapping. I am trying to implement a basic intensity-based 2d3d registration, with a 3D translation as transform and without multi-level or multi-stage registration.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I could successfully reproduce with Python wrapping the DRR generation code (DigitallyReconstructedRadiograph1.cxx) and the 3D-3D registration examples on the ITK manual (ImageRegistration8.cxx).<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I have combined now both for my 2D-3D registration, based on the template I found on [1]. This template is however based on registration method v3 and is more complex than the basic version I am trying to implement (because
it involves the Euler transform and multi-level approach).<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">My basic version (in attachment) does not work, sometimes showing a “Failed to allocate memory for image” and sometimes Python just crashes (I could not figure out the reason for this difference). I connected all components
(optimizer, metric, fixed and moving interpolator) the way I believe it makes sense, but I am not sure whether ImageRegistrationMethodv4 supports the RayCastInterpolateImageFunction and how it wants it to be connected and initialized. The code fails at the
registration.Update() command after a few seconds of running. <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">My 3D volume is a 54 MB CT scan (360X450X160), I have reduced it from the original one to try to avoid memory allocation problems.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Is my code wrong? Also, how can I debug it if I can’t put breakpoints “inside registration.Update()”?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Looking forward to your help. <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Thank you,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Fabio.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:DE-CH">[1] </span>
<a href="https://github.com/InsightSoftwareConsortium/ITKApps/blob/master/IntensityBased2D3DRegistration/IntensityBased2D3DRegistration.cxx"><span lang="EN-US" style="mso-fareast-language:DE-CH">https://github.com/InsightSoftwareConsortium/ITKApps/blob/master/IntensityBased2D3DRegistration/IntensityBased2D3DRegistration.cxx</span></a><span lang="EN-US" style="mso-fareast-language:DE-CH"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:DE-CH"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:DE-CH"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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