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International Journal of Colorectal Disease

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01-05-2020 | Colonoscopy | Original Article

The efficacy of tumor characterization and tumor detectability of linked color imaging and blue laser imaging with an LED endoscope compared to a LASER endoscope

Authors: Naohisa Yoshida, Osamu Dohi, Ken Inoue, Satoshi Sugino, Ritsu Yasuda, Ryohei Hirose, Yuji Naito, Yutaka Inada, Takaaki Murakami, Kiyoshi Ogiso, Yukiko Morinaga, Mitsuo Kishimoto, Yoshito Itoh

Published in: International Journal of Colorectal Disease | Issue 5/2020

Abstract

Objectives

An endoscope with a light-emitting diode (LED) light source which has a 2-mm close-distance observation function without magnification, has been marketed, enabling linked color imaging (LCI) and blue laser imaging (BLI) for tumor detection and characterization. We analyzed the efficacy of a LED endoscope compared to a LASER endoscope.

Methods

We retrospectively reviewed 272 lesions observed using the LED endoscopic system (Fujifilm Co., Tokyo, Japan) from May 2018 to September 2019. The Japanese NBI Classification was used for tumor characterization. We analyzed the diagnostic accuracy and confidence level. Sixty-one lesions observed with both the LED and magnified LASER endoscopes were also analyzed to compare the diagnostic accuracy. Regarding the tumor detectability, we calculated color difference values (CDVs) and brightness values (BVs) of white-light imaging, BLI, and LCI modes between the two endoscopes for each tumor.

Results

The mean polyp size was 9.2 ± 11.3 mm. Histology showed 71 sessile serrated lesions, 193 adenoma and high-grade dysplasias, and 8 T1 cancers. The diagnostic accuracy of tumors ≥ 10 and < 10 mm was 72.0% and 92.9% (p < 0.001), respectively and the high confidence rate was 93.8%. The diagnostic accuracy of LED (77.0%) was a little higher than that of LASER without magnification (65.6%, p = 0.16) but was not inferior to that of LASER with magnification (82.0%, p = 0.50). The respective CDVs of LED and LASER endoscopes were 20.6 ± 11.2 and 21.6 ± 11.2 for LCI (p = 0.30), and the respective BVs were 210.0 ± 24.2 and 175.9 ± 21.1 (p < 0.001).

Conclusions

A LED endoscope with close-distance observation improved tumor detection and characterization due to high brightness.

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Title: The efficacy of tumor characterization and tumor detectability of linked color imaging and blue laser imaging with an LED endoscope compared to a LASER endoscope
Authors: Naohisa Yoshida
Osamu Dohi
Ken Inoue
Satoshi Sugino
Ritsu Yasuda
Ryohei Hirose
Yuji Naito
Yutaka Inada
Takaaki Murakami
Kiyoshi Ogiso
Yukiko Morinaga
Mitsuo Kishimoto
Yoshito Itoh
Publication date: 01-05-2020
Publisher: Springer Berlin Heidelberg
Keywords: Colonoscopy
Laser
Published in: International Journal of Colorectal Disease / Issue 5/2020
Print ISSN: 0179-1958
Electronic ISSN: 1432-1262
DOI: https://doi.org/10.1007/s00384-020-03532-y

At a glance: The STEP trials

Springer Medicine

The efficacy of tumor characterization and tumor detectability of linked color imaging and blue laser imaging with an LED endoscope compared to a LASER endoscope

Abstract

Objectives

Methods

Results

Conclusions

At a glance: The STEP trials

Springer Medicine

Abstract

Objectives

Methods

Results

Conclusions

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