[Rtk-users] forward and back projection - MITK

[Simon Rit]

Dear Tobias,
The forward projection has 2 inputs:
- input 0: the stack of projections in which you wish to forward project,
- input 1: the volume you wish to forward project.
For the backprojection, it's exactly the same:
- input 0: the volume in which you wish to backproject,
- input 1: the stack of projections you wish to backproject.
Be aware that JosephBackProjectionImageFilter is the transpose of the
forward projection and will have some aliasing (see, e.g., De Man and Basu
<http://iopscience.iop.org/article/10.1088/0031-9155/49/11/024/meta;jsessionid=87B598ABFDC2AA07D1DED2DEE607F0E7.c2.iopscience.cld.iop.org>
to see what I mean).
I have personally never used MITK but don't hesitate to share your
experience on the mailing list.
Simon

On Wed, May 4, 2016 at 12:59 AM, Tobias Stein <tstein at stud.hs-heilbronn.de>
wrote:

> Hi all,
>
>
>
> i want to use the forward and backward projection to reduce metal
> artefacts in ct images. I’ve seen so far that  I may use the
> JosephForwardProjectionImageFilter to perform the forward projection. I’ve
> also seen the test for this class but I don’t get it, where should i put my
> 2D slice as input to execute the transformation. About the back
> transformation with the JosephBackProjectionImageFilter I also need more
> information how I can use it to transform a sinogram back to a ct slice.
> There is a test at the documentation, but the link is missing there.
>
>
>
> I’ve got another independent question.
>
> Are some of you familiar with MITK and know how to get the superbuild up
> and running with RTK? I am writing a MITK-Plugin and want to reduce the
> metal artifacts before a segmentation. So if some of you have experience
> with the combination of RTK and MITK it would be nice if you will share it
> ;)
>
>
>
> Best regards,
>
> Tobias
>
>
>
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