Patent ID: 8521261

Claim:
A lesion extracting device comprising: excitation light emitting means for emitting an excitation light toward a subject body to be examined; control means for changing an amount of the excitation light; light irradiating and receiving means for irradiating the excitation light to the subject body and receiving fluorescence generated from the subject body; distance holding means for holding a distance between the subject body and the light irradiating and receiving means at a predetermined value; measuring means for measuring a change in the intensity of the fluorescence with respect to a change in the amount of the excitation light, the intensity of fluorescence being received by the light irradiating and receiving means; and extracting means for calculating a ratio of the change in the intensity of fluorescence on the basis of a ratio of the change in the amount of the excitation light to the change in the intensity of fluorescence and for extracting a lesion part of the subject body on the basis of the ratio of the changes in the amount of the excitation light to the ratio of the changes in the intensity of fluorescence.