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Suppression of Cerebrospinal Fluid and Blood Flow Artifacts in FLAIR MR Imaging with a Single-Slab Three-dimensional Pulse Sequence: Initial Experience¹

¹ From the Department of Radiology, University of Virginia Health System, East Hospital, Rm 1063, Lee St, Box 800170, Charlottesville, VA 22908. Received October 25, 2000; revision requested December 15; revision received March 7, 2001; accepted March 29. Supported in part by grant NS35142 from the National Institute of Neurological Disorders and Stroke and by Siemens Medical Systems. Address correspondence to D.F.K. (e-mail: dfk3b@virginia.edu).

The authors compared high-signal-intensity flow-related artifacts present with a conventional two-dimensional (2D) fluid-attenuated inversion recovery (FLAIR) sequence with those seen with a single-slab, three-dimensional (3D) FLAIR sequence. Four readers graded the subarachnoid space and intraventricular artifacts, the pulsation artifacts, and the conspicuity of cranial nerves in the posterior fossa. For all comparisons, differences between 2D and 3D images were highly statistically significant, with 3D imaging being superior in all cases.

Index terms: Artifact • Brain, MR, 10.12149 • Cerebrospinal fluid, 167.12149 • Magnetic resonance (MR), pulse sequences, 10.12149

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