Author Affiliations: Department of Medicine, Cardiology Division, and Department of Radiology, Columbia University College of Physicians and Surgeons, New York, New York.
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