An L1-norm phase constraint for half-Fourier compressed sensing in 3D MR imaging
An L1-norm phase constraint for half-Fourier compressed sensing in 3D MR imaging
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DOI：
10.1007/s10334-015-0482-7
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发表时间：
2015-10-01
影响因子：
2.3
通讯作者：
Zaitsev, Maxim
中科院分区：
文献类型：
--
作者：
Li, Guobin;Hennig, Juergen;Zaitsev, Maxim
In most half-Fourier imaging methods, explicit phase replacement is used. In combination with parallel imaging, or compressed sensing, half-Fourier reconstruction is usually performed in a separate step. The purpose of this paper is to report that integration of half-Fourier reconstruction into iterative reconstruction minimizes reconstruction errors.The L1-norm phase constraint for half-Fourier imaging proposed in this work is compared with the L2-norm variant of the same algorithm, with several typical half-Fourier reconstruction methods. Half-Fourier imaging with the proposed phase constraint can be seamlessly combined with parallel imaging and compressed sensing to achieve high acceleration factors.In simulations and in in-vivo experiments half-Fourier imaging with the proposed L1-norm phase constraint enables superior performance both reconstruction of image details and with regard to robustness against phase estimation errors.The performance and feasibility of half-Fourier imaging with the proposed L1-norm phase constraint is reported. Its seamless combination with parallel imaging and compressed sensing enables use of greater acceleration in 3D MR imaging.
