Interest in the use of computed tomography (CT) for cardiac evaluation has increased rapidly since the introduction of 64-slice scanners. Reflecting this, the installation base of CT scanners in US cardiology practices has tripled in the past 2 years.1 Reports of the high diagnostic performance of coronary CT angiography (CTA), and especially its high negative predictive value in populations with low-to-intermediate prevalence of coronary disease,2,3 have been tempered by a concern about its high radiation dose to patients and the attendant risk of cancer.4
Einstein AJ. Radiation Protection of Patients Undergoing Cardiac Computed Tomographic Angiography. JAMA. 2009;301(5):545–547. doi:10.1001/jama.2009.53
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