Myocardial perfusion imaging (MPI) is invaluable in diagnosing and managing coronary artery disease; however, it accounts for approximately 10% of the radiation burden to the US population.1 Use of a “stress-only” imaging protocol, whereby stress imaging is performed first and subsequent rest imaging is omitted when stress images are determined to be normal, has been shown to reduce radiation burden without compromising patient safety.2 Although single-center data support that a 60% reduction in radiation dose may be realized with the use of stress-only imaging,2 data from a US survey suggest that stress-only protocols are infrequently performed.3 We sought to estimate current rates of stress-only imaging in the United States and worldwide, as well as the potential effect of changes in this rate on the radiation burden to the US population.
Mercuri M, Pascual TNB, Mahmarian JJ, Shaw LJ, Dondi M, Paez D, Einstein AJ, for the INCAPS Investigators Group. Estimating the Reduction in the Radiation Burden From Nuclear Cardiology Through Use of Stress-Only Imaging in the United States and Worldwide. JAMA Intern Med. 2016;176(2):269-273. doi:10.1001/jamainternmed.2015.7106