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Abstract #2424

Highly Accelerated 3D Parallel Imaging with Transitional Auto-calibration (3D-PITA)

Ren He 1 , Jingyuan Lyu 1 , and Leslie Ying 2

1 Department of Electrical Engineering, University at Buffalo, Buffalo, NY, United States, 2 Department of Electrical Engineering, Department of Biomedical Engineering, University at Buffalo, Buffalo, NY, United States

A novel 3D-PITA method is proposed for volumetric auto-calibrated parallel imaging. The method introduces a transition region between the ACS region and the highly reduced outer region [3], where the sampling pattern is specially designed to have a lower reduction factor than the outer region. We then perform a two-step calibration/reconstruction, one step with nonlinear GRAPPA and the other with GRAPPA, to obtain the final full k-space data. Experimental results demonstrate the proposed method is able to achieve high reconstruction quality at reduction factors higher than 5 and is superior to the conventional 3D GRAPPA.

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