Bydder Mark, Robson Matthew D
Department of Radiology, Magnetic Resonance Institute, UCSD Medical Center, San Diego, California 92103-8456, USA.
Magn Reson Med. 2005 Jun;53(6):1393-401. doi: 10.1002/mrm.20492.
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.
部分傅里叶（PF）技术和部分并行成像技术已通过一种约束重建技术相结合。与单独技术相比，其优点是成像时间缩短和/或信噪比提高。低分辨率相位图和线圈灵敏度可通过自动校准或预扫描并随后进行额外处理来获得。依靠共轭对称性引入的微小相位伪影可使用一种新颖的正则化方案来减少，该方案可改变重建中使用PF的程度。提出了一种非直线重建算法，并使用稳健重建研究了减少运动伪影的潜力。
