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Image enhancement Endoscopy Yutaka Saito 1 , Masayoshi Yamada 1 , Masau Sekiguchi 1 , Taku Sakamoto 1 , Takeshi Nakajima 1 , Takahisa Matsuda 1 , Masanori Sekiguchi 1 , Hiroyuki Takamaru 1 , Kazuya Inoki 1 , Hirohito Tanaka 1 , Hirokazu Taniguchi 2 , Shigeki Sekine 2 , Hiroaki Ikematsu 3 , Toshio Uraoka 4 1Endoscopy Division, National Cancer Center Hospital, Tokyo 2Pathology Division, National Cancer Center Hospital, Tokyo 3Endoscopy Division, National Cancer Center Hospital East, Kashiwa, Japan 4Department of Gastroenterology, Tokyo Medical Center, Tokyo Keyword: IEE , NBI , BLI , AFI and early colorectal carcinoma , polyp characterization pp.931-936
Published Date 2016/6/25
DOI https://doi.org/10.11477/mf.1403200668
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 NBI(narrow band imaging)and BLI(blue laser imaging)are two different image enhancement systems that use different light wavelengths unlike standard white light imaging. When these techniques are applied to endoscopies, the methods are collectively known as IEE(image enhancement endoscopy). IEE has been adopted worldwide because it is easy to use.

 NBI uses a special optical filter that converts white light into two narrow-band beams of wavelengths 415 and 540nm. These enable absorption by hemoglobin and enhance the contrast between the microvessels and surface pattern of tumors. In contrast, BLI uses two different wavelengths of laser light to enhance the microvessels and surface pattern similar to NBI.

 In colorectal diagnosis, IEE is considered to be useful in the following three aspects:polyp characterization(differential diagnosis between non-neoplastic and neoplastic lesions);tumor(polyp)detection;and depth diagnosis for early cancer.

 This brief report uses endoscopic images and literature review to summarize the usefulness of IEE in the colorectum with regard to these three aspects.


Copyright © 2016, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1219 印刷版ISSN 0536-2180 医学書院

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