Patent ID: 9629555
Date: 2017-04-25
CPC Classifications: A61B,G16H

Claim:
1. An endoscope system, comprising: a light source device that generates illumination light to irradiate an observation target; an endoscope that includes an imaging device that images the observation target with reflected light of the illumination light and that acquires a plurality of image signals from the imaging device, the plurality of image signals corresponding to a plurality of wavelength ranges including a wavelength range where an absorption coefficient changes according to oxygen saturation of blood hemoglobin; and a processor device to: calculate the oxygen saturation based on the image signals, calculate an exposure amount designation value for designating an amount of exposure, which is required to image the observation target, based on the image signals, calculate a threshold value for comparison with pixel values of the image signals according to the exposure amount designation value, detect a first region, in which the pixel values fall within a range set by the threshold value, and a second region, in which the pixel values are out of the range, and generate an oxygen saturation image, in which the oxygen saturation is displayed differently in the first and second regions, using the image signals, the oxygen saturation, and information of the first and second regions.