ELECTRONIC ENDOSCOPE SYSTEM, PROCESSOR FOR ELECTRONIC ENDOSCOPE, AND BLOOD VESSEL DATA ACQUIRING METHOD

摘要

PROBLEM TO BE SOLVED: To accurately calculate blood vessel data such as the concentration of blood or the degree of oxygen saturation of blood corresponding to the depth of a blood vessel.SOLUTION: The body cavity is internally irradiated with first-third narrow band light beams having a wavelength of 400-600 nm and mutually different in wavelength band. The first and second narrow band light beams are contained in a blue band and the third narrow band light beam is contained in a green band. First-third narrow band image data can be obtained by performing imaging at every irradiation with respective narrow band light beams and a blood vessel region containing a blood vessel is specified from the first-third narrow band image data. With respect to the pixel of the blood vessel region, the blood vessel depth data Kand blood concentration data Lcorresponding to the first brightness ratio S1between the first and second narrow band image data and the second brightness ratio S2between the third and second narrow band image data are calculated from the correlation obtained by the past diagnosis or the like. Blood vessel depth data and blood concentration data are formed on the basis of the blood vessel depth image and blood concentration image related to all of the pixels in the blood vessel region.