1286 Eur Radiol (2012) 22:1278–1286 8. Symersky P, Budde RP, Prokop MA et al (2011) Multidetector-row computed tomography imaging characteristics of mechanical pros- thetic valves. J Heart Valve Dis 20:216–222 9. Habets J, Symersky P, van Herwerden LA et al (2011) Prosthetic heart valve assessment with multidetector-row CT: imaging charac- teristics of 91 valves in 83 patients. Eur Radiol 21:1390–1396 10. Austen WG, Edwards JE, Frye RL et al (1975) A reporting system on patients evaluated for coronary artery disease. Report of the Ad Hoc Committee for Grading of Coronary Artery Disease, Council on Cardiovascular Surgery, American Heart Association. Circula- tion 51:5–40 11. LaBounty TM, Agarwal PP, Chughtai A et al (2009) Evaluation of mechanical heart valve size and function with ECG-gated 64- MDCT. Am J Roentgenol 193:389–396 12. Konen E, Goitein O, Feinberg MS et al (2008) The role of ECG-gated MDCT in the evaluation of aortic and mitral mechanical valves: initial experience. Am J Roentgenol 191:26–31 13. Meijboom WB, Mollet NR, Van Mieghem CA et al (2006) Pre- operative computed tomography coronary angiography to detect significant coronary artery disease in patients referred for cardiac valve surgery. J Am Coll Cardiol 48:1658–1665