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Abstract #2516

3D magnetic resonance fingerprinting at 50 mT with integrated estimation and correction of image distortions due to B0 inhomogeneities

Thomas O'Reilly1, Peter Börnert2, Andrew Webb1, and Kirsten Koolstra1
1Leiden University Medical Center, Leiden, Netherlands, 2Philips Research Hamburg, Hamburg, Germany


Strong B0 inhomogeneities in compact point-of-care low field permanent magnet systems can cause image distortions and reduced signal for large field-of-view images. MRF, as a flexible acquisition framework, can encode these effects into the acquisition process, to incorporate them into the reconstruction process. In this work, we use an alternating TE in the MRF sequence that supports ΔB0 estimation and image distortion correction of the MRF data. This method reduces distortions in the relaxation time maps without needing to acquire an additional ΔB0 map.

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