期刊
MAGNETIC RESONANCE IN MEDICINE
卷 53, 期 6, 页码 1393-1401出版社
JOHN WILEY & SONS INC
DOI: 10.1002/mrm.20492
关键词
partial Fourier; partially parallel imaging; conjugate symmetry; constrained least squares; regularization
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. (c) 2005 Wiley-Liss, Inc.
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