Patent ID: 7583993

Claim:
A fluorescence image display apparatus comprising: a fluorescence image obtaining means for irradiating a target subject with an excitation light and obtaining two fluorescence image data, each formed of fluorescent light of a mutually different wavelength band, based on a fluorescent light intensity emitted from the target subject upon the irradiation thereof by the excitation light, a reflectance image obtaining means for irradiating a target subject with a reference light and obtaining a reflectance image data, based on the intensity of the reference light reflected from the target subject upon the irradiation thereof by the reference light, a gain computing means for computing, based on a statistical quantity of said reflectance image data, a gain that said two fluorescence image data are to be multiplied by, a multiplying means for multiplying said two fluorescence image data and the reflectance image data by said gain to obtain two multiplied fluorescence image data and a multiplied reflectance data, a difference computing means for computing the difference data between the multiplied reflectance image data and either of the two multiplied fluorescence image data, an image forming means for forming, based on said difference data and the multiplied fluorescence image data that was not used in the computation of said difference data, a pseudo color image data representing a pseudo color image reflecting the tissue state of the target subject, and an image display means for displaying said pseudo color image.