[Rtk-users] Problems with --like and --dimension parameters of rtkforwardprojections and rtkfdk

[anais.capouillez at student.uliege.be]

Hi Simon,

I have just redone an analysis and everything went through with no issue.
My advisor and I probably messed up the values of spacing and/or dimension when we used the rtkforwardprojections.

Thank you for the quick reply and sorry for wasting a little bit of your time.

Best regards.

Anaïs

----- Mail original -----
De: "Simon Rit" <simon.rit at creatis.insa-lyon.fr>
À: "anais capouillez" <anais.capouillez at student.uliege.be>
Cc: rtk-users at public.kitware.com
Envoyé: Lundi 29 Janvier 2018 12:33:20
Objet: Re: [Rtk-users] Problems with --like and --dimension parameters of rtkforwardprojections and rtkfdk

Hi Anais,
It's a bit hard to check what's going on without the command lines. Can you
try to send the command lines that give you some problems, e.g. based on
the forwardprojection example?
Thanks,
Simon

On Mon, Jan 29, 2018 at 12:03 PM, <anais.capouillez at student.uliege.be>
wrote:

> Hi,
>
> My name is Anaïs, I’m a student in computer sciences, and I'm currently
> doing my internship, which consists partly to do a tomographic
> reconstruction.
>
> I use rtk to reconstruct my model, but I have problems when I use
> rtkforwardprojections and rtkfdk with –like or –dimension.
> Indeed, if I use them with the default parameters, it works correctly, but
> when I specify –like or certain values of –dimension the reconstruction
> isn’t correct.
> For instance if I use the example file muCT.mha as my model, it works
> perfectly with the default parameters, but if I choose –like=muCT.mha, in
> my reconstruction file there are mostly black voxels.
> I also saw that the example in the scripts for forward projections (
> http://wiki.openrtk.org/index.php/RTK/Scripts/ForwardProjection) works
> when the spacing, the origin, and the dimension specified to rtkfdk are the
> same than the model.
>
> I wanted to know why it doesn’t works when I use –like.
> Is there a relation between the geometry and dimensions and that’s why I
> have problems (for instance due to the source being too close to the
> object)?
>
>
> Thank you very much.
>
> Anaïs
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