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. Author manuscript; available in PMC: 2015 Jan 1.
Published in final edited form as: IEEE Trans Med Imaging. 2014 Aug 22;34(1):167–178. doi: 10.1109/TMI.2014.2350962

Fig. 2.

Fig. 2

Simulation data: convergence rate of OS algorithms (1, 12, 24, and 48 subsets) for 30 iterations with and without momentum for (a) sequential order and (b) bit-reversal order in Table VI. (The first iteration counts the precomputation of the denominator D in (7), and thus there are no changes during the first iteration.)