Abstract #1629
Robust Partial Fourier Parallel Imaging Using ESPIRiT and Virtual Conjugate Coils
Martin Uecker 1 and Michael Lustig 1
1
Electrical Engineering and Computer
Sciences, University of California, Berkeley,
California, United States
ESPIRiT is a recently developed algorithm for
auto-calibrated parallel MRI. It is based on an
eigenvalue analysis of the calibration data. The present
work describes an extension using virtual conjugate
coils, which allows the estimation of sensitivity maps
which include image phase. Such maps can be used in a
phase-constrained SENSE reconstruction for acceleration
with partial Fourier sampling. In contrast to other
methods, high-frequency phase is not simply discarded
but taken into account by a second eigenvector map in
affected image regions. This map can be used in an
extended soft-SENSE reconstruction which is robust
against errors from high-frequency phase.
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