Improved visibility of colorectal flat tumors using image-enhanced endoscopy

Shiro Oka, Naoto Tamai, Hiroaki Ikematsu, Takuji Kawamura, Manabu Sawaya, Yoji Takeuchi, Toshio Uraoka, Moriyama Tomohiko, Hiroshi Kawano, Takahisa Matsuda

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Colonoscopy is considered the gold standard for detecting colorectal tumors; however, conventional colonoscopy can miss flat tumors. We aimed to determine whether visualization of colorectal flat lesions was improved by autofluorescence imaging and narrow-band imaging image analysis in conjunction with a new endoscopy system. Eight physicians compared autofluorescent, narrow-band, and chromoendoscopy images to 30 corresponding white-light images of flat tumors. Physicians rated tumor visibility from each image set as follows: +2 (improved), +1 (somewhat improved), 0 (equivalent to white light), -1 (somewhat decreased), and -2 (decreased). The eight scores for each image were totalled and evaluated. Interobserver agreement was also examined. Autofluorescent, narrow-band, and chromoendoscopy images showed improvements of 63.3% (19/30), 6.7% (2/30), and 73.3% (22/30), respectively, with no instances of decreased visibility. Autofluorescence scores were generally greater than narrow-band scores. Interobserver agreement was 0.65 for autofluorescence, 0.80 for narrow-band imaging, and 0.70 for chromoendoscopy. In conclusion, using a new endoscopy system in conjunction with autofluorescent imaging improved visibility of colorectal flat tumors, equivalent to the visibility achieved using chromoendoscopy.

Original languageEnglish
Pages (from-to)35-39
Number of pages5
JournalDigestive Endoscopy
Volume27
Issue numberS1
DOIs
Publication statusPublished - Jan 1 2015

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Narrow Band Imaging
Endoscopy
Colorectal Neoplasms
Colonoscopy
Physicians
Light
Neoplasms
Optical Imaging

All Science Journal Classification (ASJC) codes

  • Radiology Nuclear Medicine and imaging
  • Gastroenterology

Cite this

Oka, S., Tamai, N., Ikematsu, H., Kawamura, T., Sawaya, M., Takeuchi, Y., ... Matsuda, T. (2015). Improved visibility of colorectal flat tumors using image-enhanced endoscopy. Digestive Endoscopy, 27(S1), 35-39. https://doi.org/10.1111/den.12445

Improved visibility of colorectal flat tumors using image-enhanced endoscopy. / Oka, Shiro; Tamai, Naoto; Ikematsu, Hiroaki; Kawamura, Takuji; Sawaya, Manabu; Takeuchi, Yoji; Uraoka, Toshio; Tomohiko, Moriyama; Kawano, Hiroshi; Matsuda, Takahisa.

In: Digestive Endoscopy, Vol. 27, No. S1, 01.01.2015, p. 35-39.

Research output: Contribution to journalArticle

Oka, S, Tamai, N, Ikematsu, H, Kawamura, T, Sawaya, M, Takeuchi, Y, Uraoka, T, Tomohiko, M, Kawano, H & Matsuda, T 2015, 'Improved visibility of colorectal flat tumors using image-enhanced endoscopy', Digestive Endoscopy, vol. 27, no. S1, pp. 35-39. https://doi.org/10.1111/den.12445
Oka S, Tamai N, Ikematsu H, Kawamura T, Sawaya M, Takeuchi Y et al. Improved visibility of colorectal flat tumors using image-enhanced endoscopy. Digestive Endoscopy. 2015 Jan 1;27(S1):35-39. https://doi.org/10.1111/den.12445
Oka, Shiro ; Tamai, Naoto ; Ikematsu, Hiroaki ; Kawamura, Takuji ; Sawaya, Manabu ; Takeuchi, Yoji ; Uraoka, Toshio ; Tomohiko, Moriyama ; Kawano, Hiroshi ; Matsuda, Takahisa. / Improved visibility of colorectal flat tumors using image-enhanced endoscopy. In: Digestive Endoscopy. 2015 ; Vol. 27, No. S1. pp. 35-39.
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