With the increasing size of major hospitals, the problem of organization of work confronting the staff radiologist is becoming more complex. In the teaching hospital, his difficulties are compounded. Direct comparison between major teaching hospitals and their component departments in different areas of the world is both difficult and invidious. Such hospitals, however, cannot long afford to ignore what appear to be promising or soundly established methods employed in other medical centers. Major departments of radiology the world over are beset by a common problem—limited opportunities for expansion to meet both the steadily growing demand for long established technical procedures and the ever rising tide of newer and more complex radiological examinations. In Great Britain, where the National Health Service has provided ready access to statistical information regarding the growing utilization of the more specialized diagnostic radiological procedures over the ten years from 1951 to 1959, the time requir...