Electronic endoscope system

摘要

In an endoscope system, rays of different wavelength bands are sequentially projected toward a target site of a test subject, to obtain image signals from the reflected rays. Reflection spectra are calculated from the image signals and subjected to a multi-regression analysis in combination with absorption spectra of those objects which are relevant to the inspection, such as blood or hemoglobin in the target site, and absorption spectra of irrelevant objects other than the relevant objects, such as bile or staining materials. Spectral components of the irrelevant objects in the reflection spectra are determined through the multi-regression analysis, and are eliminated from the reflection spectra, providing second reflection spectra. A couple of images are produced and displayed on the basis of the first reflection spectra from which the spectral components of the irrelevant objects are not eliminated and the second reflection spectra.

主权项

1. An endoscope system comprising:
a light projecting device for projecting light toward a target site of a test subject for inspection; an imaging device for capturing light reflected from or emitted from the target site to output an image signal; a reflection spectrum obtaining device for obtaining first reflection spectra of the light projected from said light projecting device and reflected from the target site, the first reflection spectra having a wavelength range of 400 nm to 750 nm and being obtained by compensating pixel levels of image data of a plurality of frames obtained from said imaging device capturing narrowband rays in a plurality of bands according to sensitivity variations of pixels of said imaging device with the respective bands and applying the compensated pixel levels to calculating spectral intensities of the reflected light in the respective bands, said plurality of bands being defined by dividing the wavelength range of 400 nm to 750 nm; a calculating device for calculating spectral components originated from irrelevant objects within the first reflection spectra through an analysis using the first reflection spectra as response variables and previously stored absorption spectra of the relevant and irrelevant objects as explanatory variables; an eliminating device for eliminating the spectral components of the irrelevant objects as calculated by said calculating device from the first reflection spectra; an information acquiring device for acquiring the information about the relevant object on the basis of the first reflection spectra and second reflection spectra from which the spectral components of the irrelevant objects have been eliminated; and a display device for graphically displaying information about the relevant object, said display device concurrently or time-sequentially displaying the information about the relevant object in a condition before influence of the irrelevant objects is eliminated and in a condition after influence of the irrelevant objects is eliminated.