Kumahara K1, Ikematsu H1, Shinmura K1, Murano T1, Inaba A1, Okumura K1, Nishihara K1, Sunakawa H1, Furue Y1, Ito R1, Sato D1, Minamide T1, Okamoto N1, Yamamoto Y1, Suyama M1, Takashima K1, Nakajo K1, Yoda Y1, Hori K1, Oono Y1, Yano T1.
Dig Endosc. 2019 Mar 14. doi: 10.1111/den.13397
Background and aim: To assess the visibility of colorectal lesions using blue laser imaging (BLI)-bright and linked-color imaging (LCI) with an eye-tracking system.
Methods: Eleven endoscopists evaluated 90 images of 30 colorectal lesions. The lesions were randomly selected. Three images of each lesion comprised white light imaging (WLI), BLI-bright, and LCI in the same position. Participants gazed at the images, and their eye movements were tracked by the eye tracker. We analyzed whether the participants could detect the lesion and how long they took to detect the lesion. We assessed the miss rate and detection time among the imaging modalities.
Results: One endoscopist was excluded, and 10 endoscopists were assessed. Overall, 12.6% of lesions were missed with WLI, 6.0% with BLI-bright, and 4.3% with LCI; the miss rate of BLI-bright and LCI was significantly lower than that of WLI (P < 0.01), with no significant difference between the former modalities (P = 0.54). Mean (± SD) detection times were 1.58 ± 1.60 s for WLI, 1.01 ± 1.21 s for BLI-bright, and 1.10 ± 1.16 s for LCI. Detection time for BLI-bright and LCI was significantly shorter than that for WLI (P < 0.0001), with no significant difference between the former modalities (P = 0.34). Regarding the miss rate and detection time between the expert and the non-experts, there was a significant difference with WLI but not with BLI-bright and LCI.
Conclusion: Blue laser imaging-bright and LCI improved the detection of colorectal lesions compared with WLI using an eye-tracking system.
1 Department of Gastroenterology and Endoscopy, National Cancer Center Hospital East, Chiba, Japan