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. Author manuscript; available in PMC: 2015 Aug 21.
Published in final edited form as: Proc SPIE Int Soc Opt Eng. 2015 Mar 18;9412:941207. doi: 10.1117/12.2082075

Figure 4.

Figure 4

(a) Noise vs. spatial resolution for different reconstruction methods. Numbers on FBP curve and PWLS curves correspond to cutoff frequency and the exponents in βR (base 10), respectively. (b) CNR vs. spatial resolution; (c) ROI of images reconstructed by different methods at matched CNR (∼12) or at matched spatial resolution (∼1 mm). Parameters in PWLS methods: 100 iterations, 20 subsets per iteration, ± 10-4 mm-1 quadratic neighborhood in Huber loss function.