The medical device of the present invention, the reference light and the excitation light to the subject a light source unit capable of irradiating alternately, an imaging unit and the fluorescence emitted when the fluorescent material is excited, the reference light is imaged, respectively the reflected light, the reflected in the subject present in the subject, by imaging the fluorescence a pixel addition processing unit for performing the pixel addition process of a plurality of pixels of the signal to one pixel of the signals in the resulting fluorescence image, a fluorescence image pixel addition process has been performed, obtained by imaging the reflected light a reference light image, the brightness ratio of the brightness adjusting unit to adjust so that the constant value, the pixel interpolation processing performed with respect for the brightness of the fluorescence image adjustments have been performed, the pixel interpolation processing facilities It has a fluorescence image that is, the brightness and the adjustment reference light image which has been subjected to, but the, the image processing unit that performs image synthesis to be included within the same observation image.本発明の医療装置は、被写体に対して励起光と参照光とを交互に照射可能な光源部と、被写体に存在する蛍光物質が励起された際に発せられる蛍光と、参照光が被写体において反射した反射光と、をそれぞれ撮像する撮像部と、蛍光を撮像して得られた蛍光像における複数画素分の信号を1画素分の信号とする画素加算処理を行う画素加算処理部と、画素加算処理が施された蛍光像と、反射光を撮像して得られた参照光像と、の明るさ比が一定値になるように調整を行う明るさ調整部と、明るさの調整が施された蛍光像に対して画素補間処理を施すとともに、画素補間処理が施された蛍光像と、明るさの調整が施された参照光像と、が同一の観察画像内に含まれるように画像合成を行う画像処理部と、を有する。
