[en] Radionuclides produced by cyclotron have played an important role in clinical nuclear medicine. Among these, ²⁰¹Tl, ¹²³I, ¹¹¹In and ⁶⁷Ga in various chemical forms have important applications in the diagnosis of cancer and heart disease using scintigraphic imaging techniques. Cardiac imaging using nuclear scintigraphy and echocardiography has been among the fastest growing diagnostic technologies in medicine during the past 15 years. Development of new tracers in conjunction with new equipment with better resolution has contributed to the better quantification and analysis of test results. The development of new biomolecules, monoclonal antibodies to myosin, platelets, fibrin and other receptor binding agents has added a new dimension to nuclear imaging studies. (orig.)