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. Author manuscript; available in PMC: 2019 Jun 1.
Published in final edited form as: IEEE Trans Med Imaging. 2018 Jun;37(6):1430–1439. doi: 10.1109/TMI.2018.2823679

Fig. 8.

Fig. 8

(a) Ground truth CT image of a case that is not used in training PTPN. (b) Image reconstructed with an arbitrarily selected parameter λ(x) = 0.005. (c) Image reconstructed after the parameter is tuned by PTPN. (d) Image reconstructed with manually tuned λ(x) = 0.12. CT images are displayed in a window [−100, 300] HU. (e) Tuned parameter map λ(x) displayed in log10 scale. (f) Optimal parameter map λ∗(x).