Meeting Banner
Abstract #4054

On the relationship between slice-GRAPPA, LeakBlock, and in-plane GRAPPA in the reconstruction of accelerated MRI data

W. Scott Hoge1,2 and Jonathan R. Polimeni2,3
1Radiology, Brigham and Women's Hospital, Boston, MA, United States, 2Dept of Radiology, Harvard Medical School, Boston, MA, United States, 3Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Charlestown, MA, United States


The structural relationship between the linear system of equations used to calibrate inplane-GRAPPA, slice-GRAPPA, and LeakBlock for SMS is analyzed. This analysis reveals that LeakBlock is structurally identical to inplane-GRAPPA in the specific case of a (synthetic) zero-slice-gap. Signal leakage in the original slice-GRAPPA formulation is thus revealed to be due to signal cancellation in the original formulation. This relationship between inplane-GRAPPA and LeakBlock further justifies its preferred usage over the original slice-GRAPPA formulation for the separation of slice-accelerated data.

This abstract and the presentation materials are available to members only; a login is required.

Join Here