Japanese

Electronic Endoscopy and Image Processing of Endoscopic Picture Hajime Yamaguchi 1 1Department of Internal Medicine, National Cancer Center Hospital pp.45-50
Published Date 1987/1/25
DOI https://doi.org/10.11477/mf.1403111885
  • Abstract
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 We demonstrated the image processing of endoscopic picture taken by electronic endoscopy, utilizing its following advanteges; digital expression of optical image by charged coupled device (CCD) and endoscopic image of high resolution without any optical bias generated using coherent optical fiber bundle.

 Color and contrast enhanccements were sucessfully done by Ohyama's method. According to it, the color images reduced into R-G-B value by CCD were directly put into computer system (Eclips system, Data General Co. Ltd.), compensating the unlinearities in intensity of R, G and B on a gray scale so as not to destroy the color balance of the original image. By this procedure, indistinct endoscopic findings, such as faint mucosal irregularities in color and unevenness by cancerous invasion, were transformed to the welldemarcated ones, most of which corresponded to the areas of cancer invasion. The results did not differ between in early gastric cancers and in superficial esophageal cancers.

 Image processing also enabled us to analyse the three dimensional difference in mucosal structure quantitatively by measuring the mean color value and analysing stereoscopic picture of a limited area. We also demonstrated the result of application of this procedure to the resected specimen of the stomach.

 In conclusion, the results shown here suggest that the electronic endoscopy provides us the real color image of gastric mucosa with high resolution, which is made possible by independent electric signals or red, green and blue informations. The implication is that the use of computer system will lead to the quantification of endoscopic diagnosis.


Copyright © 1987, 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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