[Rtk-users] How to configure beam characteristics such as filtration

[Simon Rit]

Hi,
This is not possible in RTK, the forward projections are just the line
integral of a given voxelized volume. In the Joseph forward projection
<https://github.com/SimonRit/RTK/blob/master/include/rtkJosephForwardProjectionImageFilter.h#L170>,
there is a number of templated functors that can be changed to use a
spectrum. They have been developed for Gate, see here
<https://opengate.readthedocs.io/en/latest/tools_to_interact_with_the_simulation_actors.html#fixed-forced-detection-ct>.
There, you can pass a full source spectrum to compute DRRs.
Simon

On Sat, Apr 18, 2020 at 8:21 PM Isuru Suranga Wijesinghe <
isurusuranga.wijesinghe at gmail.com> wrote:

> Hi,
>
> I’m currently working on generating DRR image from 3D CT volumes.
> Is there a way to configure beam characteristics such as filtration ?
> That is for an example we use a 120kVp beam, and the filtration is given
> as 16.25mmAl at 120kVp. Does RTK versions has two parameters to keep these
> two values (120 kVp and 16.25mmAl)
>
> Thanks and Best Regards,
> Isuru
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