1. A fluoroscopy system comprising: an illumination light source that emits white light and excitation light for irradiation of a subject; a white-light-image generating section that generates a white-light image by capturing the reflected light reflected on the subject irradiated with the white light emitted from the illumination light source; a fluorescence-image generating section that generates a fluorescence image by capturing fluorescence emitted from the subject irradiated with the excitation light emitted from the illumination light source; an intensity-distribution generating section that generates a fluorescence intensity distribution of pixels of the fluorescence image generated by the fluorescence-image generating section; a peak-detecting section that detects a fluorescence-intensity peak in the fluorescence intensity distribution generated by the intensity-distribution generating section; a peak-count calculating section that calculates a count of the peak detected by the peak-detecting section; an image-combining section that generates a combined image by superimposing a display representing a region including a pixel having the fluorescence intensity at the peak detected by the peak-detecting section on the white-light image or the fluorescence image based on the peak count calculated by the peak-count calculating section; and an image-displaying section that displays the combined image generated by the image-combining section.