Figure 7
From: Comparison of ring artifact removal methods using flat panel detector based CT images
Removal of ring artifacts from a uniform phantom image with a gold wire located at the iso-center. (a) Uncorrected, initial projection image of a gold wire placed at near of the iso-center of a uniform phantom, (b) zoomed view of the ROI selected in (a). (c) Modified ROI. (d) The reconstructed uniform phantom image with a gold wire located at the iso-center, (e) magnified view of the ROI in (d). (f-i) Corrected ROIs by using the MWPN (L max = 1, k 0 = 8.3, T HN = 0.20 and N = 4), WF (L = 4, wname='db41' and σ = 6.0), RCHT (W = 125 and T = 0.0019), and RCP methods, respectively. Same window settings 'C/W = 0.5/1.0' are used for (d-i).