Nonelderly adults are exposed to excessive doses of radiation from medical imaging procedures for which clinical data are lacking, according to reports published today in the New England Journal of Medicine. Radiologists and others familiar with the reports, including the American College of Radiology, cautioned against giving them too much credence. A retrospective cohort study covered more than 655,000 patients younger than 65 years and found a majority underwent at least one imaging procedure, some of them at doses exceeding 50 mSv per year. An editorial accompanying the study took particular aim at cardiac and myocardial perfusion imaging.
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