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Abstract #2445

Joint Iterative Image Reconstruction and Field Map Estimation In Low Field MRI

Kirsten Koolstra1, Merel de Leeuw den Bouter2, Thomas O'Reilly1, Peter Börnert1,3, Rob Remis4, Martin van Gijzen2, and Andrew Webb1

1C.J. Gorter Center for High Field MRI, Radiology, Leiden University Medical Center, Leiden, Netherlands, 2Institute of Applied Mathematics, Delft University of Technology, Delft, Netherlands, 3Philips Research Hamburg, Hamburg, Germany, 4Circuits and Systems, Delft University of Technology, Delft, Netherlands

Inaccuracies and temporal fluctuations in field map measurements form a major problem in image reconstruction for permanent magnet based low field MRI systems. These inaccuracies can potentially be corrected by using a joint image reconstruction and field map estimation algorithm. Simulation results show improved image quality when using a new updating scheme compared to standard iterative reconstructions.

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