1Department of Gastroenterology, International University of Health and Welfare Ichikawa Hospital, Chiba, Japan
2Department of Gastrointestinal Endoscopy, NTT Medical Center Tokyo, Tokyo, Japan
Copyright © 2023 Korean Society of Gastrointestinal Endoscopy
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Conflicts of Interest
Sho Suzuki received honoraria for his lectures from Fujifilm Corporation, MC Medical Inc., and Olympus Corporation. Other authors have no potential conflicts of interest.
Funding
None.
Author Contributions
Conceptualization: MN, SS; Data curation: MN, SS, YM, FI, KM; Formal analysis: MN, SS; Investigation: MN, SS; Methodology: MN, SS; Project administration: MN, SS; Resources: MN, SS, YM, FI, KM; Software: MN, SS; Supervision: KO, TM; Validation: SS, YM; Visualization: MN, SS; Writing–original draft: MN; Writing–review & editing: all authors.
Study | IEE modality | Design | Subject numbers |
ADR |
PDR |
||||
---|---|---|---|---|---|---|---|---|---|
IEE (%) | WLE (%) | Relative risk | IEE (%) | WLE (%) | Relative risk | ||||
Atkinson et al. (2019)20 | NBI | Meta-analysis | 4,491 | 45.2 | 42.3 | 1.07a) | 56.9 | 53.9 | 1.06a) |
Sakamoto et al. (2023)21 | TXI | Retrospective | 470 | 58.2 | 46.8 | 1.24a) | 80.2 | 63.9 | 1.25a) |
Ikematsu et al. (2017)22 | BLI | RCT | 963 | 54.8 | 52.7 | 1.04a) | 68.3 | 62.4 | 1.09a) |
Suzuki et al. (2023)23 | LCI | RCT | 3,050 | 58.7 | 46.7 | 1.26 | 68.6 | 59.5 | 1.15 |
Aziz et al. (2022)24 | I-scan | Meta-analysis | 2,620 | 43.4 | 39.7 | 1.20 | 51.7 | 53.9 | 1.08 |
IEE, image-enhanced endoscopy; WLE, white light endoscopy; ADR, adenoma detection rate; PDR, polyp detection rate; NBI, narrow-band imaging; TXI, texture and color enhancement imaging; BLI, blue laser imaging/blue light imaging; LCI, linked color imaging; RCT, randomized controlled trial.
a)Values were calculated on the basis of the original data.
IEE | Company | Release year | Feature |
---|---|---|---|
NBI | Olympus Corporation | 2006 | NBI emphasizes the microstructure and capillaries on the mucosal surface by modifying the center wavelength and bandwidth of a light into narrow-band illumination at 415±30 nm within the hemoglobin absorption band. |
TXI | Olympus Corporation | 2020 | TXI has two modes in terms of enhancement factors: TXI mode 1 (texture, brightness, and color enhancement) and TXI mode 2 (texture and brightness enhancement). Under TXI mode 1, the color contrast between red and white is greater than in mode 2, and the reddish mucosa appears redder. TXI mode 2 produces images that are closer to the WLE color tone. |
BLI | Fujifilm Corporation | 2012 | BLI use a 410 nm narrow-band wavelength to contrast hemoglobin and visualize high-contrast mucosal superficial vessels and structures. |
“BLI-bright” mode provides brighter images than BLI mode. | |||
LCI | Fujifilm Corporation | 2012 | LCI provides a better visibility score and significant color difference between the lesion and surrounding mucosa by separating the red color to enhance slight color difference in the mucosal membrane. |
I-scan | Pentax Corporation | 2007 | I-scan has four modes of image enhancement (SE, CE, TE, and OE). The OE has two modes (mode 1 and mode 2). The OE mode 1 improves visualization of surface microvessels, and the OE mode 2 improves contrast of white-light observation by bringing the color tone. |
Study | IEE modality | Design | Subject numbers | ADR |
PDR |
||||
---|---|---|---|---|---|---|---|---|---|
IEE (%) | WLE (%) | Relative risk | IEE (%) | WLE (%) | Relative risk | ||||
Atkinson et al. (2019)20 | NBI | Meta-analysis | 4,491 | 45.2 | 42.3 | 1.07 |
56.9 | 53.9 | 1.06 |
Sakamoto et al. (2023)21 | TXI | Retrospective | 470 | 58.2 | 46.8 | 1.24 |
80.2 | 63.9 | 1.25 |
Ikematsu et al. (2017)22 | BLI | RCT | 963 | 54.8 | 52.7 | 1.04 |
68.3 | 62.4 | 1.09 |
Suzuki et al. (2023)23 | LCI | RCT | 3,050 | 58.7 | 46.7 | 1.26 | 68.6 | 59.5 | 1.15 |
Aziz et al. (2022)24 | I-scan | Meta-analysis | 2,620 | 43.4 | 39.7 | 1.20 | 51.7 | 53.9 | 1.08 |
NBI, narrow-band imaging; TXI, texture and color enhancement imaging; BLI, blue laser imaging/blue light imaging; LCI, linked color imaging; SE, surface enhancement; CE, contrast enhancement; TE, tone enhancement; OE, optical enhancement.
IEE, image-enhanced endoscopy; WLE, white light endoscopy; ADR, adenoma detection rate; PDR, polyp detection rate; NBI, narrow-band imaging; TXI, texture and color enhancement imaging; BLI, blue laser imaging/blue light imaging; LCI, linked color imaging; RCT, randomized controlled trial. Values were calculated on the basis of the original data.