By accurate count there were 1 417 Canadian diagnostic radiologists in active practice in 1982 compared with 1 293 in 1977. Between 1966 and 1975 an average of 69 were certified each year by the Royal College of Physicians and Surgeons of Canada, while between 1970 and 1979 the number had fallen to an average of 59, with about four more entering practice following certification in Quebec or by recognition of American or British qualifications. The age of radiologists has risen and a larger proportion are women. Comparison with other data indicates that Canadian radiology manpower is now in balance. Continuation of manpower monitoring is necessary as a potential shortage of radiologists may occur because of the reduced number being trained, of physician immigration restrictions, of moderately less career-time in the work force on the part of women radiologists, of further advances in imaging technology, and of the demands of interventional radiology.