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Abstract #5157

Iterative SENSE with Integrated EPI Nyquist Ghost and Distortion Corrections

Uten Yarach1,2, Hendrik Mattern1, and Oliver Speck1

1Department of Biomedical Magnetic Resonance, Otto-von-Guericke University Magdeburg, Magdeburg, Germany, 2Department of Radiological Technology, Chiang Mai University, Chaigmai, Thailand

The quality of EPI image is intrinsically hindered by Nyquist ghost and geometric distortion which are commonly handled by a 1D non-phase encoded reference and a field map based corrections, respectively. In some cases, a 2D phase reference is required, but scan time is increased. The geometric-mismatch between EPI and coil sensitivities is another concern. Here, the 2D phase correction (without prolonging scan time) and the distortion correction are integrated into a single forward operator rather than considering them consecutively. The results show that the stable reduction in Nyquist ghosting and distortion can improve the tSNR of EPI time series.

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