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.

How to access this content:

For one year after publication, abstracts and videos are only open to registrants of this annual meeting. Registrants should use their existing login information. Non-registrant access can be purchased via the ISMRM E-Library.

After one year, current ISMRM & ISMRT members get free access to both the abstracts and videos. Non-members and non-registrants must purchase access via the ISMRM E-Library.

After two years, the meeting proceedings (abstracts) are opened to the public and require no login information. Videos remain behind password for access by members, registrants and E-Library customers.

Click here for more information on becoming a member.