With the growth of cardiac imaging, there has been heightened concern about the resulting increased exposure to ionizing radiation. Andrew J. Einstein, MD, PhD, of Columbia University Medical Center and New York-Presbyterian Hospital in New York City, outlined the currently available research on radiation exposure in cardiac imaging in the Feb. 7 issue of the Journal of the American College of Cardiology and concluded that while strong data specifically addressing the risks of cancer from cardiac imaging don’t exist, increased risks can be projected from studies involving similar levels of radiation exposure.