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Journal of Biomedical Optics • Open Access

Objective evaluation of visibility in virtual chromoendoscopy for esophageal squamous carcinoma using a color difference formula
Author(s): Masahito Inoue; Yoichi Miyake; Takeo Odaka; Toru Sato; Yoshiyuki Watanabe; Atsunori Sakama; Satoki Zenbutsu; Osamu Yokosuka

Paper Abstract

Computed virtual chromoendoscopy with flexible spectral imaging color enhancement (FICE) is a new dyeless imaging technique that enhances mucosal and vascular patterns. However, a method for selecting a suitable wavelength for a particular condition has not been established. The aim of this study is to evaluate the color difference method for quality assessment of FICE images of the intrapapillary capillary loop in magnifying endoscopy for esophageal squamous cell carcinoma. The color difference between 60 microvessels and background mucosa observed using the magnifying endoscope was 8.31±2.84 SD under white light and 12.26±3.14 (p=0.0031), 11.70±4.49 (p=0.0106), and 17.49±5.40 (p<0.0001) in FICE modes A, B, and C, respectively. The visibility scores for microvessels observed by medical students were 6.00±1.12 points under white light and 11.1±2.25 (p<0.0001), 8.65±2.06 (p=0.0001), and 12.55±2.56 (p<0.0001) in FICE modes A, B, and C, respectively. Furthermore, the measurement of color difference was correlated with the visibility score assigned by medical students (Pearson's correlation coefficient=0.583, p<0.0001) In conclusion, the color difference method corresponds to human vision and is an appropriate method for evaluation of endoscopic images.

Paper Details

Date Published: 1 September 2010
PDF: 6 pages
J. Biomed. Opt. 15(5) 056019 doi: 10.1117/1.3502666
Published in: Journal of Biomedical Optics Volume 15, Issue 5
Show Author Affiliations
Masahito Inoue, Chiba Univ. (Japan)
Yoichi Miyake, Chiba Univ. (Japan)
Takeo Odaka, Chiba Univ. (Japan)
Toru Sato, Chiba Univ. (Japan)
Yoshiyuki Watanabe, Chiba Univ. (Japan)
Atsunori Sakama, Chiba Univ. (Japan)
Satoki Zenbutsu, Chiba Univ. (Japan)
Osamu Yokosuka, Chiba Univ. (Japan)

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