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Journal of Gastroenterology

, Volume 51, Issue 9, pp 883–890 | Cite as

New-generation narrow band imaging improves visibility of polyps: a colonoscopy video evaluation study

  • Kiyoshi Ogiso
  • Naohisa YoshidaEmail author
  • Kewin Tien Ho Siah
  • Hiroaki Kitae
  • Takaaki Murakami
  • Ryohei Hirose
  • Yutaka Inada
  • Osamu Dohi
  • Tetsuya Okayama
  • Kazuhiro Kamada
  • Kazuhiko Uchiyama
  • Takeshi Ishikawa
  • Osamu Handa
  • Hideyuki Konishi
  • Yuji Naito
  • Akio Yanagisawa
  • Yoshito Itoh
Original Article—Alimentary Tract

Abstract

Background

The benefits of narrow band imaging (NBI) in colorectal polyp detection remain questionable. Previous NBI has poorer brightness and resolution than white light (WL). However, recently these factors were improved by the new-generation video processor system (EVIS LUCERA ELITE) in comparison with the previous system (EVIS LUCERA SPECTRUM). The aim of this study was to investigate whether NBI with EVIS LUCERA ELITE could improve the visibility of colorectal polyps compared to WL.

Methods

We analyzed prospectively 240 colorectal polyps (group 1: ELITE with CF-HQ290 scope, 80 polyps; group 2: ELITE with PCF-Q260AZI scope, 80 polyps; group 3: SPECTRUM with PCF-Q260AZI scope, 80 polyps) whose videos were recorded using NBI and WL at Kyoto Prefectural University of Medicine. The videos were evaluated in a randomized order by three experts and three non-experts. Each polyp was assigned a polyp visibility score from 4 (excellent visibility) to 1 (poor visibility). The polyp visibility scores in each mode and their relationship to the clinical characteristics were analyzed.

Results

The mean polyp visibility scores of NBI with ELITE system were significantly higher than those of WL (ELITE with CF-HQ290: 3.14 ± 0.87 vs. 2.75 ± 0.98, p < 0.0001, ELITE with PCF-Q260AZI: 3.03 ± 0.92 vs. 2.83 ± 0.93, p = 0.0006). Conversely, the mean polyp visibility score of NBI using SPECTRUM system with PCF-Q260AZI was significantly lower than WL (2.75 ± 1.06 vs. 3.05 ± 0.92, p < 0.0001).

Conclusions

Our study showed that NBI using EVIS LUCERA ELITE improved polyp visibility.

Keywords

Narrow band imaging Colorectal polyp Video Detection 

Notes

Acknowledgments

We thank Dr. Nobuaki Yagi and all members of the Department of Molecular Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, for helping with this study.

Compliance with ethical standards

Conflict of interest

There are no financial supports or relationships that may pose conflicts of interest in our manuscript. Yuji Naito received scholarship funds for the research from Astellas Pharm Inc., Otsuka Pharmaceutical Co., Ltd., Takeda Pharmaceutical Co., Ltd., Eisai Co., Ltd., and Tanabe-Mitsubishi Co., Ltd.

Supplementary material

Supplementary material 1 (MP4 16888 kb)

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Copyright information

© Japanese Society of Gastroenterology 2016

Authors and Affiliations

  • Kiyoshi Ogiso
    • 1
  • Naohisa Yoshida
    • 1
    Email author
  • Kewin Tien Ho Siah
    • 2
  • Hiroaki Kitae
    • 3
  • Takaaki Murakami
    • 1
  • Ryohei Hirose
    • 1
  • Yutaka Inada
    • 1
  • Osamu Dohi
    • 1
  • Tetsuya Okayama
    • 1
  • Kazuhiro Kamada
    • 1
  • Kazuhiko Uchiyama
    • 1
  • Takeshi Ishikawa
    • 1
  • Osamu Handa
    • 1
  • Hideyuki Konishi
    • 1
  • Yuji Naito
    • 1
  • Akio Yanagisawa
    • 4
  • Yoshito Itoh
    • 1
  1. 1.Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical ScienceKyoto Prefectural University of MedicineKyotoJapan
  2. 2.Division of Molecular Gastroenterology and HepatologyUniversity Medicine Cluster, National University HospitalSingaporeSingapore
  3. 3.Department of GastroenterologyAsahi University Murakami Memorial HospitalGifuJapan
  4. 4.Department of Pathology, Graduate School of Medical ScienceKyoto Prefectural University of MedicineKyotoJapan

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