Linked color imaging improves the visibility of various featured colorectal polyps in an endoscopist’s visibility and color difference value

Purpose Linked color imaging (LCI) by laser endoscopy is a novel narrow band light observation. In this study, we analyzed the efficacy of LCI for improving the various featured colorectal polyp’s visibility utilizing a subjective endoscopist’s visibility scoring and objective color difference (CD) value. Methods We retrospectively reviewed two pictures both with white light (WL) and LCI for 54 consecutive neoplastic polyps 2–20 mm in size. All pictures were evaluated by four endoscopists according to a published polyp visibility score from four (excellent visibility) to one (poor visibility). Additionally, we calculated CD value between each polyp and surrounding mucosa in LCI and WL using an original software. Results The mean polyp visibility scores of LCI (3.11 ± 1.05) were significantly higher than those of WL (2.50 ± 1.09, P