Patent ID: 8421034

Claim:
A fluoroscopy apparatus comprising: a white-light-image generating section that generates a white-light image from a signal obtained by image-capturing reflected light of white light that irradiates an observation target; a fluorescence-image generating section that generates a fluorescence image from a signal obtained by image-capturing fluorescence generated by irradiation of the observation target with excitation light; a fluorescence-image correcting section that normalizes the fluorescence image generated by the fluorescence-image generating section by using the white-light image generated by the white-light-image generating section; a displacement calculating section that calculates the displacement of the observation target in the white-light image by processing a plurality of the white-light images generated by the white-light-image generating section from signals obtained by image-capturing at time intervals; a region-size calculating section that calculates the size of a region having a fluorescence intensity higher than or equal to a predetermined threshold value by processing the fluorescence image generated by the fluorescence-image generating section; and a control unit that controls the fluorescence-image correcting section so that normalization of the fluorescence image is stopped when the displacement of the observation target calculated by the displacement calculating section relative to the size of the region calculated by the region-size calculating section is higher than or equal to a predetermined proportion.