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Non-Fourier-encoded parallel MRI using multiple receiver coils

✍ Scribed by Dimitris Mitsouras; W. Scott Hoge; Frank J. Rybicki; Walid E. Kyriakos; Alan Edelman; Gary P. Zientara

Publisher
John Wiley and Sons
Year
2004
Tongue
English
Weight
173 KB
Volume
52
Category
Article
ISSN
0740-3194

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✦ Synopsis

Abstract

This paper describes a general theoretical framework that combines non‐Fourier (NF) spatially‐encoded MRI with multichannel acquisition parallel MRI. The two spatial‐encoding mechanisms are physically and analytically separable, which allows NF encoding to be expressed as complementary to the inherent encoding imposed by RF receiver coil sensitivities. Consequently, the number of NF spatial‐encoding steps necessary to fully encode an FOV is reduced. Furthermore, by casting the FOV reduction of parallel imaging techniques as a dimensionality reduction of the k‐space that is NF‐encoded, one can obtain a speed‐up of each digital NF spatial excitation in addition to accelerated imaging. Images acquired at speed‐up factors of 2× to 8× with a four‐element RF receiver coil array demonstrate the utility of this framework and the efficiency afforded by it. Magn Reson Med 52:321–328, 2004. © 2004 Wiley‐Liss, Inc.

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