Computed tomography

Cardiac computed tomography has seen a rapid technical development over the past two decades, and currently allows reliable, noninvasive coronary angiography on a routine basis. Associated exposure to radiation has gradually decreased with contemporary CT technology. Novel functional applications, such as stress myocardial perfusion imaging and CT derived fractional flow reserve calculation, expand the applicability of cardiac CT from a technique to rule out coronary artery disease, to a means to risk stratify patients and make therapeutics decisions.