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Top: Reference high-definition HD images and reconstructed low-definition LD images of a sample simulation dataset. Bottom: Full-dose (30-min) images of an in-vivo dataset reconstructed using 72 EM updates (vendor’s default) and 140 updates. Increasing the number of updates improved the convergence but led to PSF Gibbs artifacts (see arrows). Thus, MR-guided MAPEM (210 updates) was used as a reference.
