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 Börnert^1,3, 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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