Figure 4.

Example images from a dual-energy abdominal CT study. ((a) and (b))  Original water and iodine density images of suboptimal image quality due to its high noise level. ((c) and (d)) Noise-reduced water and iodine density images using the ACNR algorithm [12]. Cross-contamination artifacts are clearly visible throughout the liver area in (c). The iodinated hepatic vessels in (d) are the root cause of the cross-contaminations seen in (c). ((e) and (f)) Noise-reduced water density images using the proposed algorithm which are free of contamination.