Speaker
Description
The Multiple Emission Tomography (MET) detector is a single-layer ring of scintillator modules, that can work in Compton camera mode on top of the conventional "PET" one. Provided that a fast reconstruction that can exploit its high sensitivity can be developed, it is expected to enable imaging of exotic nuclei with high-energy gamma emissions. In this work, we present a list-mode Ordered Subsets Expectation Maximization (LM-OSEM) extension of the CoReSi Compton camera reconstruction adapted for MET. CoReSi was originally designed for standard two-layer Compton cameras and we extend it to operate on the single-layer geometry. We also replaced the native Maximum Likelihood Expectation Maximization (MLEM) solver with OSEM for faster convergence, and introduce event batching to decouple GPU memory usage from dataset size. Compunding all the improvements introduced enables the reconstruction of one million events in less than 5 minutes on consumer-grade hardware
| Track | PSMR |
|---|---|
| Presentation type | Oral |