Figure 6
From: Comparison of ring artifact removal methods using flat panel detector based CT images
Removal of ring artifacts from a rabbit bone with a metal implant image. (a) Uncorrected, initial image, (b) magnified view of the ROI in (a). (c-f) Corrected ROIs by using the MWPN (L max = 1, k 0 = 8.1, T HN = 0.25 and N = 8), WF (L = 4, wname='db42' and σ = 8.0), RCHT (W = 125 and T = 0.0019), and RCP methods, respectively. (g-j) Effect of pre-correction on the MWPN, WF, RCHT and RCP methods. Corrected images by using the WF (L = 4, wname='db42' and σ = 4.5), RCHT (W = 125 and T = 0.0021), and RCP methods applying on the pre-corrected image are displayed in (g-j), respectively. (k-n) Difference ROIs between the uncorrected and corrected ROIs (g-j), respectively. Same window settings 'C/W = 0.6716/0.5827' are used for all sub-figures.