Abstract #4054

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

W. Scott Hoge^1,2 and Jonathan R. Polimeni^2,3

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

Synopsis

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