Since 1936, when radioisotopes were introduced in clinical medicine with the therapeutic use of P32, many radiologists have been involved in the overall development of nuclear medicine. In this development internists, surgeons, general practitioners, and physicists have also participated, but from the beginning individual interest rather than any particular medical specialty has determined the use of the radioisotopes. The American Boards of Internal Medicine and of Pathology expect candidates to possess some knowledge of radioisotope procedures and of their interpretation. Furthermore, the Board of Pathology gives credit for up to six months of training in nuclear medicine as part of the clinical pathology program. The Board of Radiology is the only Board that requires specific training and gives separate examination and certification in nuclear medicine. At present the American Board of Radiology requires three months of training in nuclear medicine. The Board, however, does not appear to consider this ...