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. Author manuscript; available in PMC: 2014 Jul 8.
Published in final edited form as: IEEE Trans Med Imaging. 2012 Aug 8;31(10):1977–1988. doi: 10.1109/TMI.2012.2212203

Fig. 8.

Fig. 8

Comparison of the normalized likelihood difference (first row) and mean squared error (second row) of the maximum likelihood reconstruction using the OT-EM algorithm and the algorithms in [11] and [21] at three different count levels.