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B 1 AC‐MAMBA: B 1 array combined with multiple‐acquisition micro B 0 array parallel magnetic resonance imaging
Author(s) -
Paley Martyn N.J.,
Lee Kuan J.,
Wild James M.,
Fichele Stanislao,
Whitby Elspeth H.,
Wilkinson Iain D.,
Van Beek Edwin J.,
Griffiths Paul D.
Publication year - 2003
Publication title -
magnetic resonance in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.696
H-Index - 225
eISSN - 1522-2594
pISSN - 0740-3194
DOI - 10.1002/mrm.10464
Subject(s) - electromagnetic coil , sense (electronics) , reduction (mathematics) , signal (programming language) , plane (geometry) , nuclear magnetic resonance , noise (video) , encoding (memory) , computer science , acoustics , physics , optics , mathematics , electrical engineering , artificial intelligence , engineering , geometry , quantum mechanics , image (mathematics) , programming language
The combination of an in‐plane B 1 sensitivity encoding (SENSE) technique with a simultaneous multiple‐slice B 0 field step technique (multiple‐acquisition micro B 0 array (MAMBA)) has produced high scan time reduction factors (R ≤ 8). In this study, two slices were acquired simultaneously in combination with ×2 and ×4 SENSE in‐plane encoding using a MAMBA stepped B 0 field coil inside a four‐channel phased‐array coil system. Experiments were performed on a 1.5 T Infinion system (Philips Medical Systems, Cleveland, OH). The signal‐to‐noise ratio (SNR) was reduced with higher R factors, as was expected from the reduced number of acquisitions used to create the unaliased images. The combination of SENSE and MAMBA offers great promise for reducing scan times through parallel acquisition while at the same time reducing the number of RF channels required by a factor equal to the number of field steps employed. The B 1 array combined with MAMBA ( B 1 AC‐MAMBA) technique is applicable when the length of an object is much greater than its diameter, as in scanning limbs or in whole‐body screening for disease. Magn Reson Med 49:1196–1200, 2003. © 2003 Wiley‐Liss, Inc.