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Renal Arteries: Navigator-gated Balanced Fast Field-Echo Projection MR Angiography with Aortic Spin Labeling: Initial Experience¹

¹ From the Departments of Medicine, Cardiovascular Division (E.S., W.J.M., P.B., K.V.K., R.M.B., M.S.), and Radiology (W.J.M.), Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Mass; Department of Diagnostic Radiology, University Hospital, Technical University of Aachen, Pauwelsstrasse 30, 52057 Aachen, Germany (E.S.); Philips Research Laboratory, Hamburg, Germany (P.B.); and Philips Medical Systems, Best, the Netherlands (R.M.B., M.S.). Received August 13, 2001; revision requested October 9; final revision received March 4, 2002; accepted April 3. E.S. supported in part by German Research Council grant SP 634/1-1. W.J.M. supported in part by American Heart Association Established Investigator grant 9740003N. Address correspondence to E.S. (e-mail: spuenti@rad.rwth-aachen.de).

A cardiac-triggered free-breathing three-dimensional balanced fast field-echo projection magnetic resonance (MR) angiographic sequence with a two-dimensional pencil-beam aortic labeling pulse was developed for the renal arteries. For data acquisition during free breathing in eight healthy adults and seven consecutive patients with renal artery disease, real-time navigator technology was implemented. This technique allows high-spatial-resolution and high-contrast renal MR angiography and visualization of renal artery stenosis without exogenous contrast agent or breath hold. Initial promising results warrant larger clinical studies.

© RSNA, 2002

Index terms: Magnetic resonance (MR), motion studies, 961.12942, 961.12943, 961.149, 961.721 • Magnetic resonance (MR), three-dimensional, 961.12942, 961.12943, 961.149, 961.721 • Magnetic resonance (MR), vascular studies, 961.12942, 961.12943, 961.149, 961.721 • Renal arteries, MR, 961.12942, 961.12943, 961.149, 961.721 • Renal arteries, stenosis or obstruction, 961.721

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