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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. 5.

Fig. 5

Patient CT scan data: convergence rate of OSb methods (24, 48 subsets) for 30 iterations with and without momentum for (a) several choices of (c, ζ, λ) with a fixed ck = c = 1.5 and (b) the choices of (λ, η) for an increasing ck in (24) with 24 subsets and ζ = 30 [HU].