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Published online before print October 2, 2002, 10.1148/radiol.2252011167
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(Radiology 2002;225:583-588.)
© RSNA, 2002

Technical Developments

Randomly Segmented Central k-Space Ordering in High-Spatial-Resolution Contrast-enhanced MR Angiography of the Supraaortic Arteries: Initial Experience1

Winfried A. Willinek, MD, Jürgen Gieseke, PhD, Rudolf Conrad, MD, Holger Strunk, MD, Romhild Hoogeveen, PhD, Marcus von Falkenhausen, MD, Ewald Keller, MD, Horst Urbach, MD, Christiane K. Kuhl, MD and Hans H. Schild, MD

1 From the Department of Radiology, University of Bonn, Sigmund-Freud-Strasse 25, D-53105 Bonn, Germany (W.A.W., R.C., H.S., M.v.F., E.K., H.U., C.K.K., H.H.S.); and Philips Medical Systems, Best, the Netherlands (J.G., R.H.). Received July 9, 2001; revision requested August 20; final revision received January 11, 2002; accepted February 25. Address correspondence to W.A.W. (e-mail: willinek@uni-bonn.de).

Contrast material–enhanced three-dimensional (3D) magnetic resonance (MR) angiography of the supraaortic arteries with randomly segmented central k-space ordering (ie, contrast-enhanced timing-robust angiography [CENTRA]) was performed in 16 patients. CENTRA enabled reliable depiction of the aortic arch up to the circle of Willis at high spatial resolution (true voxel size, 0.81 x 0.81 x 1.0 mm3). With CENTRA, the divergent demands of high spatial resolution, wide anatomic coverage, and arterial phase imaging have been reconciled. The random order of central k-space acquisition may minimize artifacts in contrast-enhanced 3D MR angiography caused by unstable contrast material opacification at the initiation of sampling.

© RSNA, 2002

Index terms: Arteries, basilar, 1753.12142 • Arteries, stenosis or obstruction, 17.721 • Carotid arteries, 172.12142 • Magnetic resonance (MR), k-space, 17.12142 • Magnetic resonance (MR), vascular studies, 17.12142




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