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. Author manuscript; available in PMC: 2020 Jan 1.
Published in final edited form as: IEEE Trans Radiat Plasma Med Sci. 2019 Jan;3(1):1–23. doi: 10.1109/TRPMS.2018.2883437

Fig. 15.

Fig. 15.

Simulated myocardial SPECT images reconstructed using an iterative order-subset expectation-maximization (OS-EM) method with accurate models, i.e., the XCAT phantom, of the system response and imaging physics for significant improvement in both image quality and quantitative accuracy. From top to bottom row, OS-EM images obtained without any modeling (1st row), with the collimator-detector response (CDR) (2nd row), with CDR and attenuation (3rd row), and with CDR, attenuation and scatter modeling (4th row). From the left to right column: OS-EM with 1, 2, 3, 4, 5, 10 and 20 iterations.