期刊
MAGNETIC RESONANCE IMAGING
卷 25, 期 8, 页码 1123-1129出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.mri.2007.01.003
关键词
parallel imaging; SENSE; regularization; preconditioning; phase constraint
Sensitivity encoding (SENSE) is a magnetic resonance technique that unifies gradient and receive coil encoding. SENSE reconstructs the image by solving a large, ill-conditioned inverse problem, which generally requires regularization and preconditioning. The present study suggests a simple heuristic for determining the regularization parameter. Also discussed are the use of density weighting and intensity correction as preconditioners and the role that coil sensitivity estimation has in regularization. A modification to the intensity correction is proposed for use with a phase constraint. (C) 2007 Elsevier Inc. All rights reserved.
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