Non-invasive visualization of coronary arteries using electron beam computed tomography (EBCT)

Coronary angiography remains the diagnostic standard for establishing the p resence, site, and severity of coronary artery disease. Electron beam compu ted tomography (EBCT), a non-invasive imaging method with very high spatial and temporal resolution, is well suited for cardiac imaging. Using a stand ard protocol, EBCT permits the visualization of the coronary arteries. Sten oses and occlusions of the native arteries and of coronary artery bypass gr afts can be reliably diagnosed. Extremely calcified segments have to be exc luded from evaluation. Reduced image quality, mainly due to fast vessel mot ion and superposition of large veins, impairs the results obtained for the right and left circumflex coronary artery. Possible clinical applications a re the followup after angioplasty (PTCA without stent) and bypass surgery, the exclusion of coronary artery disease in patients with low likelihood of disease, and the evaluation of coronary anomalies.