<div dir="ltr"><div class="gmail_default" style="font-family:verdana,sans-serif;font-size:small">Hi Gabriele,</div><div class="gmail_default" style="font-family:verdana,sans-serif;font-size:small"><br></div><div class="gmail_default" style="font-family:verdana,sans-serif;font-size:small">we have migrated away from this mailing list and to the <a href="https://discourse.itk.org/">forum</a>. Please repost your question there.</div><div class="gmail_default" style="font-family:verdana,sans-serif;font-size:small"><br></div><div class="gmail_default" style="font-family:verdana,sans-serif;font-size:small">Regards,</div><div class="gmail_default" style="font-family:verdana,sans-serif;font-size:small">Dženan</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Jun 17, 2019 at 9:01 AM Gabriele Belotti <<a href="mailto:gabriele.belotti@mail.polimi.it">gabriele.belotti@mail.polimi.it</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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<p class="MsoNormal"><span lang="EN-GB">Dear all,<br>
<br>
I’m testing this particular module to evaluate a 2D/3D registration context.<br>
I was able to obtain DRRs using Siddon-Jacobs ray tracing method (starting point is an FDK of POPI model) and as a proof of concept I fed two of these resulting projections (first at the correct angles and centering, then at small tilted angles with added displacement
to the CT volume center).<br>
What I noticed is that the computation of a single step in the registration is incredibly slow even in the case where the initial transform is already at the correct position (around 60”).<br>
I think the long computation times are possibly caused by metric calculation on the 2 Projections vs the DRRs generated from the volume by the interpolators (Siddon-Jacobs), but I cannot verify this assumption since I can only observe a full registration step.<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-GB">Is there a way to speed up the process? Unfortunately the custom classes that were implemented in this module do not come with many useful tools such as a Sampling Strategy.<br>
<br>
Thanks to anyone contributing<u></u><u></u></span></p>
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