1. Method for producing a dynamic coronary artery system roadmap of a patient comprising the steps of: recording and storing a dynamic visual image of a beating heart for a cardiac cycle so as to create a mask sequence; injecting a visual contrast medium into the coronary artery system of the patient; recording and storing a corresponding dynamic visual image of the beating heart for another cardiac cycle after injecting the contrast medium so as to create a contrast sequence; and subtracting the corresponding contrast sequence from the mask sequence in order to produce the roadmap sequence of the coronary artery system.