3D CT Backprojection based on flat X-ray images

I am looking for advice regarding CT reconstruction.

My dataset is made of 360 X-ray images (flat panel) of an object taken in steps of 1 degree. I also know the source to detector distance.

My question if there is a plugin for 3DSlicer to reconstruct a 3D CT image based on these 360 flat X-ray images. (Absolute calibration to HU is not that important, is mostly about the geometry).

If not, do you recommend a good independent code on GitHub to do this?

Thanks in advance!

We usually suggest RTK: https://www.openrtk.org/

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Slicer does not do reconstructions from shadow images. You should look into Reconstruction Toolkit (https://www.openrtk.org/) for that purpose.