Endoscopic Observation of Tissue by Narrowband Illumination

Kazuhiro Gono, Kenji Yamazaki, Nobuyuki Doguchi, Tetsuo Nonami, Takashi Obi, Masahiro Yamaguchi, Nagaaki Ohyama, Hirohisa Machida, Yasushi Sano, Shigeaki Yoshida, Yasuo Hamamoto, Takao Endo

Research output: Contribution to journalArticlepeer-review

278 Citations (Scopus)


We propose a new illumination method for a medical endoscope: narrow band imaging (NBI), in which the spectral bandwidth of the filtered light is narrowed. To confirm how the spectral specifications of the filtered light influence a reproduced image, an experiment was conducted observing the endoscopic images of the back mucosa of a human tongue. In addition, the effect of NBI on endoscopie images was investigated through preliminary clinical tests in colonoscopy and upper gastrointestinal endoscopy. It has been shown that NBI can enhance the capillary pattern and the crypt pattern on the mucosa. These patterns are useful features for diagnosing an early cancer.

Original languageEnglish
Pages (from-to)211-215
Number of pages5
JournalOptical Review
Issue number4
Publication statusPublished - 2003 Jan 1
Externally publishedYes


  • Blood vessel
  • Clinical test
  • Narrowband illumination
  • Tissue imaging
  • Video endoscope

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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