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Combining a reduced field of excitation with SENSE-based parallel imaging for maximum imaging efficiency
Authors
Cornelis AT van Den Berg
Hans Hoogduin
+4 more
Peter R Luijten
Ronald Mooiweer
AJE Raaijmakers
Alessandro Sbrizzi
Publication date
1 January 2017
Publisher
'Royal College of Obstetricians & Gynaecologists (RCOG)'
Abstract
\u3cp\u3ePURPOSE: To show that a combination of parallel imaging using sensitivity encoding (SENSE) and inner volume imaging (IVI) combines the known benefits of both techniques. SENSE with a reduced field of excitation (rFOX) is termed rSENSE.\u3c/p\u3e\u3cp\u3eTHEORY AND METHODS: The noise level in SENSE reconstructions is reduced by removing voxels from the unfolding process that are rendered silent by using rFOX. The silent voxels need to be identified beforehand, this is done by using rFOX in the coil sensitivity maps. In vivo experiments were performed at 7 Tesla using a 32-channel receive coil.\u3c/p\u3e\u3cp\u3eRESULTS: Good image quality could be obtained in vivo with rSENSE at acceleration factors that are higher than could be obtained using SENSE or IVI alone. With rSENSE we were also able to accelerate scans using an rFOX that was purposely designed to be imperfect or incompatible at all with IVI.\u3c/p\u3e\u3cp\u3eCONCLUSION: rSENSE has been demonstrated in vivo with two-dimensionally selective radiofrequency pulses. Besides allowing additional scan acceleration, it offers a greater robustness and flexibility than IVI. The proposed method can be used with other field strengths, anatomies and other rFOX techniques. Magn Reson Med 78:88-96, 2017. © 2016 The Authors Magnetic Resonance in Medicine published by Wiley Periodicals, Inc. on behalf of International Society for Magnetic Resonance in Medicine. This is an open access article under the terms of the Creative Commons Attribution Non Commercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.\u3c/p\u3
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Last time updated on 18/04/2019