W Scott Hoge1, Huan Tan2, Robert
A. Kraft2
1Radiology, Brigham and Women's
Hospital, Boston, MA, United States; 2Virgina-Tech Wake Forest
School of Biomedical Engineering, Winston-Salem, NC, United States
Nyquist
ghosts are an inherent artifact in EPI acquisitions. We propose here a method
that fuses ghost correctuion methods based on spatial encoding (via multiple
coils) and temporal encoding (via cyclic variations in the acquisition
sequence). Post acquisition, PLACE is employed to cancel ghosting artifacts
in data used to estimate self-referenced parallel MR imaging reconstruction
coefficients. The improved pMRI
reconstruction coefficients are then employed on each frame, to reconstruct a
ghost free image. We demonstrate that
this self-referenced approach significantly reduces Nyquist ghosts, and is robust
to temporal variations such as magnetic field drift with minimal latency.