[ITK] [ITK-users] TwoProjectionRegistration

[Dženan Zukić]

Hi Gabriele,

we have migrated away from this mailing list and to the forum
<https://discourse.itk.org/>. Please repost your question there.

Regards,
Dženan

On Mon, Jun 17, 2019 at 9:01 AM Gabriele Belotti <
gabriele.belotti at mail.polimi.it> wrote:

> Dear all,
>
> I’m testing this particular module to evaluate a 2D/3D registration
> context.
> 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).
> 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”).
> 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.
>
> 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.
>
> Thanks to anyone contributing
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