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The  Origin Ensemble  method allows image reconstruction of photon-limited emission tomography data to be performed entirely in the image domain. This offers attractive perspectives such as including scatter events for image reconstruction in  Positron Emission Tomography . In this work, the probability of single Compton scatter along a line-of-response is estimated by the  Single Scatter Simulation  algorithm; for every event a decision is made whether this event is reconstructed along a line or an area confined by two circular arcs holding potential scatter points. First results of 2D simulations show visual agreement with the reference and locally increased  contrast recovery coefficient  values.

PET image reconstruction using the Origin Ensemble algorithm and geometric constraints