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UCL / STIR

Software for Tomographic Image Reconstruction
http://stir.sourceforge.net/
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Siemens mMR single scatter has unexpected scale #1280

Open KrisThielemans opened 8 months ago

KrisThielemans commented 8 months ago

As observed in https://github.com/UCL/STIR/issues/1163, the scatter scale factors for the NEMA phantom had to be around .2, but normally STIR single scatter is scaled to have the correct absolute values. #1279 fixed the thresholds for the scale factor, such that the example now works, but it is still unclear why the scatter scales are so much lower than expected.

KrisThielemans commented 3 weeks ago

This is still a problem for SIRF as it uses the default settings for the scatter estimator https://github.com/UCL/STIR/blob/bdf04aca863ac6cffdfd635efdb7ec3db16533b3/src/scatter_buildblock/ScatterEstimation.cxx#L88-L89