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Journal of Biomedical Optics

Appearance of enhanced tissue features in narrow-band endoscopic imaging
Author(s): Kazuhiro Gono; Takashi Obi; Masahiro Yamaguchi; Nagaaki Oyama; Hirohisa Machida; Yasushi Sano; Shigeaki Yoshida; Yasuo Hamamoto; Takao Endo
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Paper Abstract

This study was performed to examine the usefulness of medical endoscopic imaging utilizing narrow-band illumination. The contrast between the vascular pattern and the adjacent mucosa of the underside of the human tongue was measured using five narrow-band illuminations and three broadband illuminations. The results demonstrate that the pathological features of a vascular pattern are dependent on the center wavelength and the bandwidth of illumination. By utilizing narrow-band illumination of 415±30 nm, the contrast of the capillary pattern in the superficial layer was markedly improved. This is an important benefit that is difficult to obtain with ordinary broadband illumination. The appearances of capillary patterns on color images were evaluated for three sets of filters. The narrow, band imaging (NBI) filter set (415±30 nm, 445±30 nm, 500±30 nm) was selected to achieve the preferred appearance of the vascular patterns for clinical tests. The results of clinical tests in colonoscopy and esophagoscopy indicated that NBI will be useful as a supporting method for observation of the endoscopic findings of early cancer.

Paper Details

Date Published: 1 May 2004
PDF: 10 pages
J. Biomed. Opt. 9(3) doi: 10.1117/1.1695563
Published in: Journal of Biomedical Optics Volume 9, Issue 3
Show Author Affiliations
Kazuhiro Gono, Olympus Optical Co., Ltd. (Japan)
Takashi Obi, Tokyo Institute of Technology (Japan)
Masahiro Yamaguchi, Tokyo Institute of Technology (Japan)
Nagaaki Oyama, Tokyo Institute of Technology (Japan)
Hirohisa Machida, National Cancer Ctr. Hospital (Japan)
Yasushi Sano, National Cancer Ctr. Hospital (Japan)
Shigeaki Yoshida, National Cancer Ctr. Hospital (Japan)
Yasuo Hamamoto, Sapporo Medical Univ. (Japan)
Takao Endo, Sapporo Medical Univ. (Japan)

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