Abstract #4232

Description of the off-resonance dependency in slice-selective FISP MRF

Gregor Körzdörfer^1,2, Bartosz Guzek^1,3, Yun Jiang⁴, Josef Pfeuffer¹, Bernhard Hensel², Peter Speier¹, and Mathias Nittka¹

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

In Magnetic Resonance Fingerprinting (MRF), quantitative parameter maps are generated by matching pseudo randomly generated MR signals with a precalculated dictionary. A common implementation of MRF is based on an unbalanced SSFP (FISP) sequence in combination with a slice-selective excitation. In this work, we demonstrate its sensitivity to off-resonances in specific configurations, investigate the underlying spin physics and derive according mitigation approaches.

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