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Fluorescence endoscopy and endoscopic device therefor

  • US 5,092,331 A
  • Filed: 08/24/1989
  • Issued: 03/03/1992
  • Est. Priority Date: 01/30/1989
  • Status: Expired due to Term
First Claim
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1. A fluorescence endoscopy comprising the steps of:

  • sequentially irradiating, to an object to be examined containing a fluorescent substance, light rays in a plurality of wavelength ranges whose degrees of exciting said fluorescent substance are different from one another and which can constitute a color image;

    obtaining images of said object to be examined to which said light rays have been irradiated by said respective wavelength ranges;

    constituting a color image of said object to be examined using said images obtained of said object;

    obtaining a color picture image as first light information about said object to be examined by the light rays of the wavelength range having a largest degree of exciting said fluorescent substance among said light rays irradiated, said first light information including a fluorescence information component other than a reflected light information component of said object;

    obtaining said reflected light information component of said object as second light information about said object to be examined by the light rays of the wavelength ranges other than the wavelength range for obtaining said first light information among said light rays irradiated; and

    obtaining fluorescence-based information about said object to be examined based on said first light information and said second light information by a) comparing said first and second light information and b) making said fluorescence information component conspicuous in said reflected light information component of said object which is to be examined in said first light information.

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