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. Author manuscript; available in PMC: 2017 Jan 7.
Published in final edited form as: Phys Med Biol. 2015 Dec 9;61(1):296–319. doi: 10.1088/0031-9155/61/1/296

Figure 7.

Figure 7

Evaluation of correlated and uncorrelated PWLS reconstruction algorithms for systems with differing source and detector blurs. The schematic on the left illustrates the different imaging system scenarios with varying amounts of source and detector blur. These scenarios have a constant total system blur and a varying blur distribution – from detector-dominated (point a) to source-dominated (point e). The subfigures (a-e) show the resolution-variance tradeoff for each of the systems with blur scenarios corresponding to points a-e in the schematic. For reference, FDK reconstructions are also included in the plots. Note that the correlated noise model shows the greatest advantage for the scenario where source blur dominates.