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Subclavian MR Arteriography: Reduction of Susceptibility Artifact with Short Echo Time and Dilute Gadopentetate Dimeglumine¹

¹ From the Departments of Radiology (M.A.N., T.L.C., R.C.C., F.J.L.) and Biostatistics (H.M.K.), University of Michigan, Ann Arbor, and the Department of Radiology, Weill Medical College of Cornell University, Box 141, Cornell MRI, 416 E 55th St, New York, NY 10022 (Q.D., M.R.P.). Received June 7, 1999; revision requested July 29; revision received December 29; accepted January 12, 2000. Supported in part by grants from the Whitaker Foundation and the Robert Wood Johnson Clinical Scholars Program. Address correspondence to M.R.P. (e-mail: map2008@mail.med.cornell.edu).

At arterial phase gadolinium-enhanced magnetic resonance (MR) angiography, artifactual stenosis of the subclavian artery is sometimes seen adjacent to the subclavian vein on the side of the contrast material injection. Experiments in phantoms and in 19 patients showed increased artifact with longer echo time and higher concentration of injected contrast material. An effective method to substantially decrease this susceptibility artifact was threefold dilution of gadopentetate dimeglumine and use of a short echo time (1 msec).

Index terms: Arteries, MR, 562.12142 • Arteries, subclavian, 562.12142 • Magnetic resonance (MR), artifact • Magnetic resonance (MR), vascular studies, 562.12142 • Veins, MR, 562.12142 • Veins, subclavian, 562.12142

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