In an embodiment of the present invention, a kind of equipment comprises display device.This display device shows from body cavity at the desaturation image of the tissue of visible electromagnetic (EM) spectrum IT And strengthen image with the first colour of this desaturation image combining.This first colored image that strengthens represents from body cavity in outer first data of catching of visible electromagnetic spectrum.Setting desaturation image and the first colored relative brightness strengthened between image, thus emphasize the first data at the tissue of visible electromagnetic spectrum IT and then the information content of improvement is provided.