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Time-of-Flight MR Angiography: Comparison of 3.0-T Imaging and 1.5-T Imaging—Initial Experience¹

¹ From the Department of Radiology, University of Bonn, Sigmund-Freud-Strasse 25, D-53105 Bonn, Germany (W.A.W., M.B., B.S., H. J. Tschampa, C.K., H.U., H. J. Textor, H.H.S.); and Philips Medical Systems, Best, the Netherlands (J.G.). Received June 27, 2002; revision requested August 23; final revision received March 15, 2003; accepted March 20. Address correspondence to W.A.W. (e-mail: willinek@uni-bonn.de).

Intracranial three-dimensional time-of-flight (TOF) magnetic resonance (MR) angiography was performed in seven healthy volunteers and eight patients with both 1.5-T and 3.0-T MR systems with standard and high spatial resolutions (true voxel sizes, 0.48 x 0.75 x 2.00 mm and 0.30 x 0.44 x 1.00 mm, respectively). Superior image quality and significantly better depiction of small vessel segments and vascular disease were observed at high-spatial-resolution 3.0-T TOF MR angiography but not at standard 1.5-T or standard 3.0-T TOF MR angiography (P < .01, respectively). Intracranial high-spatial-resolution TOF MR angiography at 3.0-T imaging provides diagnostic improvement in studies of cerebrovascular disease.

© RSNA, 2003

Index terms: Brain, MR, 17.12142 • Magnetic resonance (MR), vascular studies, 17.12142

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