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. Author manuscript; available in PMC: 2023 Apr 4.
Published in final edited form as: IEEE Trans Radiat Plasma Med Sci. 2023 Jan 30;7(4):410–420. doi: 10.1109/trpms.2023.3240934

Fig. 7:

Fig. 7:

Qualitative comparison of different training methods and OSEM tested on 177Lu XCAT phantoms. Subfigure (a)-(c): true activity map, attenuation map and OSEM reconstruction (16 iterations and 4 subsets); (d)-(f): regularized EM using sequential training, gradient truncation, end-to-end training, respectively; (g) and (h): line profiles in (a).