Patent ID: 9532740
Date: 2017-01-03
CPC Classifications: A61B,G06T

Claim:
1. An endoscope system comprising: an illuminator for irradiating first light having a first wavelength range and having an absorption coefficient changeable with an oxygen saturation level of hemoglobin in blood and second light having a second wavelength range different from said first wavelength range to a subject body; an imaging element for imaging of a reflection image of said subject body illuminated with said first light and second light, to acquire a first image signal according to reflected light of said first, and to acquire a second image signal according to reflected light of said second light; a processor configured for: normalizing said first image signal by use of said second image signal to form a normalized signal; referring to a first memory which previously stores a relationship between said normalized signal and said oxygen saturation level to generate an oxygen saturation level image by visualizing said oxygen saturation level of a blood vessel present at a particular depth according to said normalized signal and said relationship from said first memory; and displaying said oxygen saturation level image on a display, wherein said first image signal includes information of said oxygen saturation level and shape information of said subject body, said second image signal includes shape information of said subject body, and luminance value becomes uniform in portions without said information of said oxygen saturation level in said normalized signal.