Unless something is happening, an x ray department can seem as uninteresting as an empty garage or aircraft hangar, but it is unethical to let visitors watch patients being examined. Fortunately, when the distinguished members of the Cirencester Science and Technology Society visited us to learn about radiological scanning, one of our secretaries agreed to act as a model, so demonstrating ultrasonography was not a problem. The visitors could see her heart and aorta pulsating, learn how a Doppler signal can be used to assess vascular flow, and witness how abdominal anatomy can be obscured by …