Figure 5.

Example images from a dual-energy liver study. ((a) and (b)) Original water and iodine density image. ((c) and (d)) Noise-reduced water and iodine density images using the ACNR algorithm [12]. Cross-contamination artifacts are clearly visible near the main hepatic portal vein (arrow) in (c). The iodinated hepatic portal vein (arrow) in (d) is the root cause of the cross-contamination seen in (c). ((e) and (f)) Noise-reduced water density images using the proposed algorithm which are free of contamination.