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AJNR - American Journal of Neuroradiology

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American Journal of Neuroradiology 21:1028-1031 (6 2000)
© 2000 American Society of Neuroradiology

ARTICLE

Contrast-enhanced MR Angiography: The Effects of k-Space Truncation on Luminal Representation in a Carotid Artery Phantom Model

Elias R. Melhem^a, Jean-Micheal Serfaty^a, Lisa Jones^a, Ryuta Itoh^a, Brian S. Kuszyk^a, Jean-Baptiste Martin^a, Philippe Gailloud^a, Kieran P.J. Murphy^a and Daniel A. Rufenacht^a

^a From the Department of Radiology and Radiological Sciences (E.R.M., J.-M.S., L.J., R.I., B.S.K., P.G., K.P.J.M.), The Johns Hopkins Hospital, Baltimore, MD, and the Department of Radiology (J.-B.M., D.A.R.), Geneva University Hospital, Geneva, Switzerland.

Summary: Using carotid bifurcation phantom models with different degrees of stenoses, we evaluated the accuracy of vessel lumen representation on MR images obtained from the inverse Fourier transform of different k-space percentages. Our results show that the lower thresholds of truncated k-space sampling are dictated by the severity of luminal narrowing. The defined thresholds may help improve efficiency of 3D MR imaging of the carotid arteries while maintaining adequate luminal representation.

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