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Partial fourier partially parallel imaging
Author(s) -
Bydder Mark,
Robson Matthew D.
Publication year - 2005
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.20492
Subject(s) - fourier transform , regularization (linguistics) , iterative reconstruction , computer science , total variation denoising , algorithm , fourier analysis , reduction (mathematics) , noise reduction , artificial intelligence , computer vision , mathematics , mathematical analysis , geometry
The techniques of partial Fourier (PF) and partially parallel imaging have been combined using a constrained reconstruction technique. The benefits compared with the individual techniques are reduced imaging time and/or an increase in signal‐to‐noise ratio. Low‐resolution phase maps and coil sensitivities may be obtained using autocalibration or from a prescan followed by additional processing. Minor phase artifacts that are introduced by relying on conjugate symmetry can be reduced using a novel regularization scheme to vary the degree to which PF is used in the reconstruction. A nonrectilinear reconstruction algorithm is presented and the potential for motion artifact reduction is investigated using robust reconstruction. Magn Reson Med 53:1393–1401, 2005. © 2005 Wiley‐Liss, Inc.