Design, implementation, and optimization of MEGAlibʹs image reconstruction tool Mimrec

MEGAlib, the Medium-Energy Gamma-ray Astronomy library, is a toolset to simulate and analyze data from gamma-ray detectors. An integral part of MEGAlib is its imaging tool Mimrec, which performs list-mode-likelihood image deconvolution. Mimrec has to handle data from coded masks, Compton cameras, and pair conversion telescopes with different response representations, on different imaging grids, with different deconvolution algorithms, etc. This versatility requires a highly modular and object-oriented design to avoid overhead and code redundancy. In addition, since some applications require close to real-time image reconstruction, great care has to be taken to optimize the library.