Transcatheter Aortic Valve Implantation (TAVI) is a promising new technique in the treatment of aortic stenosis and has the potential to supercede conventional surgical replacement procedures . To be successful, TAVI requires many detailed measurements to be made prior to surgery. Such measurements include the valve plane diameter, the diameter of both the ascending and descending aorta, the diameters of valve sinuses and the distance from the valve plane to the coronary ostia.
These measurements can be determined using CT imaging [2, 3]. This article describes a study of image quality, radiation doses and acquisition times in such TAVI planning examinations using an innovative acquisition mode on a new 512-slice CT machine compared to standard 128-slice CT system.