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Thoracic Aorta: Motion Artifact Reduction with Retrospective and Prospective Electrocardiography-assisted Multi–Detector Row CT¹

¹ From the Institute of Diagnostic Radiology (J.E.R., J.K.W., D.W., B.M., P.R.H.) and Clinic of Cardiovascular Surgery (M.L.), University Hospital Zurich, Rämistrasse 100, CH-8091 Zurich, Switzerland. From the 2000 RSNA scientific assembly. Received February 19, 2001; revision requested March 26; revision received May 24; accepted June 22. Address correspondence to P.R.H. (e-mail: paul.hilfiker@dmr.usz.ch).

The authors compared prospective (n = 20) and retrospective (n = 20) electrocardiography (ECG)-assisted multi–detector row computed tomography (CT) with non-ECG-assisted multi–detector row CT (n = 20) of the thoracic aorta with regard to reduction of motion-related artifacts. Image quality was rated for transverse source and sagittal oblique images of the thoracic aorta, including the aortic valve. ECG-assisted multi–detector row CT compared with non-ECG-assisted multi–detector row CT showed a significant reduction in motion artifacts for the entire thoracic aorta.

Index terms: Aorta, CT, 943.12915 • Computed tomography (CT), artifact • Computed tomography (CT), multi–detector row

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