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Abstract #1018

Magnetic Field Fingerprinting (MFF)

Gregor Körzdörfer1,2, Yun Jiang3, Peter Speier1, Josef Pfeuffer1, Dan Ma3, Bartosz Guzek1,4, Bernhard Hensel2, Vikas Gulani3,5, Mark Griswold3,5, and Mathias Nittka1

1Siemens Healthcare GmbH, Erlangen, Germany, 2Max Schaldach-Stiftungsprofessur für Biomedizinische Technik, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany, 3Biomedical Engineering, Case Western Reserve University, Cleveland, OH, United States, 4Georg-August-Universität Göttingen, Göttingen, Germany, 5Radiology, Case Western Reserve University, Cleveland, OH, United States

Parameter maps obtained from Magnetic Resonance Fingerprinting (MRF) are sensitive to magnetic field inhomogeneities. Most MRF publications are based on FISP to minimize the dependency on B0. In FISP however, the magnetization is spoiled at the end of every TR resulting in lower T2 differentiation capability and SNR compared to TrueFISP. We propose an MRF variant that applies TrueFISP, FISP and FLASH in a continuous acquisition, and additionally incorporates B1 and B0 in the dictionary, which are resolved by a pattern match. This implementation enables increased spiral resolution and spiral deblurring with the derived high-resolution B0 maps.

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