10.1007/s00330-004-2521-z European Radiology © Springer-Verlag 2004 10.1007/s00330-004-2521-z Cardiac Visualisation of non-invasive coronary bypass imaging 4-row vs. 16-row multidetector computed tomography M. Fawad Khan 1 , Christopher Herzog 1 , Kai Landenberger 1 , Adel Maataoui 1 , Sven Martens 2 , Hanns Ackermann 3 , Anton Moritz 2 and Thomas J. Vogl 1 (1) Institute for Diagnostic and Interventional Radiology, Johann Wolfgang Goethe University, Theodor-Stern-Kai 7, 60590 Frankfurt/Main, Germany (2) Department for Thoracic and Cardiovascular Surgery, Johann Wolfgang Goethe University, Theodor-Stern-Kai 7, 60590 Frankfurt/Main, Germany (3) Institute for Epidemilogy and Medical Statistics, Johann Wolfgang Goethe University, Theodor-Stern-Kai 7, 60590 Frankfurt/Main, Germany M. Fawad Khan Email: fawad@gmx.de Phone: +49-69-63017277 Fax: +49-69-63017258 Received: 15 June 2004 Revised: 25 August 2004 Accepted: 30 August 2004 Published online: 15 October 2004 Abstract The purpose of this study was to investigate the image quality of coronary artery bypass graft visualization in 4- and 16-row multidetector CT using multiple imaging reformations. Material and Methods: One hundred sixteen patients underwent CT examination of the heart after receiving CABG. Group A (n=58) received 4-row MDCT; group B (n=58) received 16-row MDCT. Various bypass types such as LITA to LAD and venous grafts to the RCA and RCX were included in the study. A five-point Likert scale was used to grade image quality. Each bypass was reviewed under different imaging reformations: thin slap maximum intensity projection (MIP thin), multiplanar reformation (MPR) and volume rendering technique (VRT). Special attention was paid to the delineation of the distal anastomosis. Interobserver correlation