Overview: Includes supplementary material: In the United States the performance of nuclear cardiology studies continues to increase. As an example, in 1998, 4,160,739 myocardial perfusion imaging st- ies were done. In 2001 this number increased to 5,679,258. The nonhospital performance of perfusion imaging increased over the same time period from 1,188,731 to 1,789,207 studies (Arlington Medical Resources data). In 1999, there were approximately 1300 nonhospital sites with nuclear imaging capabi- ties, of which 600 were in physician’s offices. By 2001, there were approximately 1700 nonhospital
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