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DOI: 10.1148/radiol.2273020354
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(Radiology 2003;227:897-902.)
© RSNA, 2003

Technical Developments

Metallic Renal Artery MR Imaging Stent: Artifact-free Lumen Visualization with Projection and Standard Renal MR Angiography1

Elmar Spuentrup, MD, Alexander Ruebben, MD, Matthias Stuber, PhD, Rolf W. Günther, MD and Arno Buecker, MD

1 From the Department of Diagnostic Radiology, Technical University of Aachen, Pauwelsstrasse 30, 52057 Aachen, Germany (E.S., A.R., R.W.G., A.B.); Department of Medicine (Cardiovascular Division), Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Mass (E.S., M.S.); and Philips Medical Systems, Best, the Netherlands (M.S.). Received April 4, 2002; revision requested May 30; final revision received September 26; accepted October 15. Address correspondence to E.S. (e-mail: spuenti@rad.rwth-aachen.de).

A cardiac-triggered free-breathing three-dimensional (3D) balanced fast field-echo projection renal magnetic resonance (MR) angiographic sequence was investigated for in-stent lumen visualization of a dedicated metallic renal artery stent. Fourteen prototype stents were deployed in the renal arteries of six pigs (in two pigs, three stents were deployed). Projection renal MR angiography was compared with standard contrast material–enhanced 3D breath-hold MR angiography. Artifact-free in-stent lumen visualization was achieved with both projection MR angiography and contrast-enhanced MR angiography. These promising results warrant further studies for visualization of in-stent restenosis.

© RSNA, 2003

Index terms: Magnetic resonance (MR), artifact, 961.93 • Magnetic resonance (MR), vascular studies, 961.12942, 961.12943 • Renal arteries, MR, 961.12942, 961.12943 • Renal arteries, stenosis or obstruction, 961.72 • Stents and prostheses, 961.1268




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