Method for accelerating magnetic resonance imaging using varying k-space sampling density and phase-constrained reconstruction
A method is presented for accelerating magnetic resonance imaging. In 3D MRI, the k-space in the phase encoding plane is divided into two symmetric parts and three asymmetric parts. Different sampling densities are applied in different parts. Images are reconstructed by iteratively minimizing a cost function when random sampling is applied in each part. A phase constraint term is added into the cost function to improve the quality of the reconstruction by exploiting the conjugate symmetry of k-space.
Albert-Ludwigs-Universitaet Freiburg
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Juergen Maxim Guobin
Hennig Zaitsev Li