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. 2020 Nov 26;35(2):176–186. doi: 10.1007/s12149-020-01550-y

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© The Author(s) 2020

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Fig. 5 — Representative coronal views of PET and CT images of a patient presenting with non-small lung cancer. a Original unfiltered (OSEM) PET image and filtered using, b Gaussian, c bilateral, d NLM and e MR-NLM filters. The corresponding bias map (filtered—OSEM) is also displayed below each image. f The corresponding CT image. The vertical line profile plotted over the lung lesion is illustrated in the bottom panel