A Self-Calibrated Parallel Imaging Method for Radial Trajectories
Arunachalam A, Samsonov A, Block W
A self-calibrated Parallel Imaging method with low reconstruction times is presented for two and three dimensional radial trajectories. The radially over sampled center of k-space is used to estimate individual receiver sensitivity profiles. Receiver sensitivities are then reintroduced in the image domain and the prohibitively large matrix inversion procedure is completed entirely in k-space by performing a small number of fast matrix inversions. The in-vivo applicability of the method for 2D radial applications for acceleration factors of 2 and 4. In CE-MRA, scan times were reduced from 42 seconds to 14 seconds to achieve isotropic resolution along all three dimensions.