[Rtk-users] rebinning

[niloufar teyfouri]

Thanks dear Cyril
But I have read the grass' paper titled "3D cone-beam CT reconstruction for
circular trajectories" and Turbell have explained this method ( T-FDK) in
his PhD thesis "Cone-Beam Reconstruction Using Filtered Backprojection" . I
want to implement DFR in 3D cbct, so I need rebinning it. Grass have done
this in his paper. I would be happy if you say your idea about it.

Best

On Mon, Dec 28, 2015 at 1:23 PM, Cyril Mory <cyril.mory at uclouvain.be> wrote:

> Hi Niloufar,
>
> There is no such program in RTK, and you won't find it anywhere else. What
> you are asking for is impossible.
> In 2D fan-beam, rays can be sorted into groups of parallel rays, because
> they are indeed parallel to each other.
> In 3D cone beam along a circular trajectory, the rays outside the central
> slice cannot be sorted into groups of parallel rays : they just aren't
> parallel.
>
> Hope that helps.
>
> PS : The more I think about it, the more I think there must be some
> connection between the possibility of re-binning to parallel projections
> and Tuy's data sufficiency condition. If someone has a clear understanding
> of this area, I'm curious about it.
>
>
> On 12/18/2015 08:43 PM, niloufar teyfouri wrote:
>
> Hi Dear RTK users
>
> Do you know a program in RTK for rebinning the 3D circular cone beam ct
> projections on the flat panel detector to parallel beam projections?
>
> I would be appreciate, If you could help me.
>
>
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>
>


-- 


*Niloufar.Teyfouri, PhD candidate of biomedical engineering,**Isfahan
University of Medical Sciences,* Isfahan, Iran*.** <http://misp.mui.ac.ir/>*
*email:bioniloofar at yahoo.com <bioniloofar at yahoo.com>*
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