Figure 8

Removal of ring artifacts from the analyzed CT images by applying the SBRC method and effect of using wavelet-analysis-based method on cone beam CT volume images. (a) Corrected bone image obtained from micro-CT machine (r _max = 15, r _min = 1.5 and l _m = 5) (C/W = 0.4132/0.2994), (b) corrected bone image from dental-CT machine (r _max = 15, r _min = 1.5 and l _m = 5) (C/W = 0.4714/0.1998), (c-e) corrected three rat abdomen slices (r _max = 15, r _min = 1.5 and l _m = 5) (C/W = 0.2628/0.0481), (f) corrected ROI of the rabbit image (r _max = 15, r _min = 1.5 and l _m = 5) (C/W = 0.6716/0.5827), (g) difference image between the uncorrected and corrected ROI of rabbit (C/W = 0.6716/0.5827), (h) corrected uniform phantom image with a gold wire located at the iso-center (r _max = 15, r _min = 1.5 and l _m = 5) (C/W = 0.5/1.0). (i) Corrected first rat abdomen slice using the wavelet-analysis-based method [13] (C/W = 0.2628/0.0481).