[Rtk-users] (no subject)

[Simon Rit]

Hi,
The preprocessing is described with a graph at
http://www.openrtk.org/Doxygen/classrtk_1_1ProjectionsReader.html
Follow the Elekta path. I0 is used by
LUTbasedVariableI0RawToAttenuationImageFilter
<http://www.openrtk.org/Doxygen/classrtk_1_1LUTbasedVariableI0RawToAttenuationImageFilter.html>.
You can process the projection one by one but you should also apply
ElektaSynergyRawLookupTableImageFilter
<http://www.openrtk.org/Doxygen/classrtk_1_1ElektaSynergyRawLookupTableImageFilter.html>
before.
Simon

On Wed, Sep 28, 2022 at 6:05 PM Alexandre <alexandrecafarofr at gmail.com>
wrote:

> Hello all,
>
> When I want to reconstruct a CBCT from Elekta XVI projections I can do the
> following, first define a geometry and then stack and process the .his
> projections,
>
> # Generate geometry.xml
> os.system('./rtkelektasynergygeometry' +
>           ' --xml ' + fraction_folder + '/_Frames.xml' +
>           ' --output ' + fraction_folder + '/geometry.xml')
>
> # Generate projection.mha
> os.system('./rtkprojections' +
>           ' --path ' + fraction_folder + '/' +
>           ' --regexp .*.his ' +
>           ' --output ' + fraction_folder + '/projections.mha' +
>           ' --i0=' + i_0)
>
> Do you know what is the preprocess of the projections with i0 ?
>
> Log scale? clipping?
>
> I would like to process the projections individually
>
> Thank you very much
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