To the Editor: In their analysis of data from the National Hospital Ambulatory Medical Care Survey, Dr Korley and colleagues1 reported a 3-fold increase in the prevalence of computed tomography (CT) or magnetic resonance imaging (MRI) use for injuries presenting to emergency departments over the decade 1998 through 2007, without an increase in the severity of the injuries involved. They proposed a number of possible explanations for the increase in advanced imaging, several of which related to increased access to CT (and MRI) scanners.
Lauderdale V. Advanced Radiology in US Emergency Departments. JAMA. 2011;305(2):148-149. doi:10.1001/jama.2010.1954