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Submillimeter Three-dimensional Coronary MR Angiography with Real-time Navigator Correction: Comparison of Navigator Locations¹

¹ From the Cardiovascular Division, Beth Israel Deaconess Medical Center and Harvard Medical School, 330 Brookline Ave, Boston, MA 02215 (M.S., R.M.B., P.G.D., K.V.K., W.J.M.), and Philips Medical Systems, Best, the Netherlands (M.S., R.M.B.). Received August 17, 1998; revision requested September 22; revision received October 19; accepted January 20, 1999. Address reprint requests to M.S. (e-mail: mstuber@caregroup.harvard.edu).

Three-dimensional free-breathing coronary magnetic resonance angiography was performed in eight healthy volunteers with use of real-time navigator technology. Images acquired with the navigator localized at the right hemidiaphragm and at the left ventricle were objectively compared. The diaphragmatic navigator was found to be superior for vessel delineation of middle to distal portions of the coronary arteries.

Index terms: Coronary vessels, MR, 54.121416, 54.12142 • Heart, MR, 54.12142 • Magnetic resonance (MR), motion correction • Magnetic resonance (MR), vascular studies, 54.121416, 54.12142

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