Detectability of colorectal polyps by using BLI

Yoshida_headshotNaohisa Yoshida, MD, PhD, from the Department of Molecular Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, Graduate School of Medical Science, in Kyoto, Japan discusses this Original Article “Improvement in the visibility of colorectal polyps by using blue laser imaging (with video).”

We proved the improvement of polyp visibility by blue laser imaging (BLI) (Fujifilm, Tokyo, Japan). BLI is a kind of a narrow-band light observation via a laser light source. We analyzed the recorded videos of 100 polyps using BLI-bright mode and WL. The videos were evaluated by 4 expert endoscopists and 4 non-experts. Each polyp was assigned a visibility score from 4 (excellent visibility) to 1 (poor visibility). The results showed the mean visibility scores of BLI-bright mode were significantly higher than those of WL for both experts and non-experts (experts: 3.10±0.95 vs. 2.90±1.09, P=.00013; non-experts: 3.04±0.94 vs. 2.78±1.03, P<.0001). This indicated that polyps were more easily visible under BLI-bright mode compared to WL.

Figure 2. Case presentation. A, Colonic polyp, superficial, 15 mm on the cecum. WL: visibility score, 2. B, BLI bright mode: visibility score, 4. C, BLI mode: visibility score, 3. BLI, blue laser imaging; WL, white light.

Our study clarified the efficacy of BLI about polyp visibility. We believe that polyp detectability depends on many factors and one of the most important factors is polyp visibility. It is important to determine whether a new image enhanced endoscopy can improve polyp visibility. Our movie method in this study enables us to examine the function of polyp visibility easily and reproducibly of new modality.

BLI enabled us to improve polyp visibility. It has a possibility of improvement of polyp detectability. Now, we are conducting a multicenter study about polyp detectability using BLI. The improvement of polyp detectability by BLI is expected highly.

Find the article abstract here.

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