An embodiment of the invention relates to a medical device with a tubular interior space for accommodating the subject to be examined, a cladding of the tubular interior space facing towards the subject to be examined and a device for lighting the tubular interior space, which includes at least one lamp. The lamp is mounted on the side of the cladding of the tubular interior space facing towards the subject to be examined and forms the tunnel contour of the tubular interior space.