Scatter correction for a single/prompt photon with arbitrary energy

[rshopa]

Hello.

Sorry for possible duplication if a similar question has been asked before.

As I see from the source code (ScatterSimulation.h, ScatterSimulation.inl) , there is a theoretical possibility to estimate Compton cross-section for any photon energy, not only 511 keV. But Is it possible to simulate SSS-sinograms for, say 1274 keV, without diving deep into the code?

Yes, I know a single photon requires something different than SSS modelling and there are issues with the detector, too (pair production etc). But I am studying the positronium lifetime imaging and consider any crazy ideas how to extend the correction for a pair of back-to-backs to include a prompt/de-excitation photon, too.

Thanks in advance for the help!

PS - Our data in list-mode (Jagiellonian PET), so I estimate particular factors from sparse SSS sinograms got in STIR via interpolation. Yet I still don't know how to normalize those sinograms. Asked a question on the mailing listson 2024-04-18, but no response so far.