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Abstract #0433

Spiral MRF at 7T with simultaneous B1 estimation

Guido Buonincontri1, Rolf Schulte2, Mirco Cosottini3,4, Stephen Sawiak5, and Michela Tosetti4,6

1INFN Pisa, Pisa, Italy, 2GE Global Research, Munich, Germany, 3Department of Radiology, University of Pisa, Pisa, Italy, 4IMAGO7 Foundation, Pisa, Italy, 5Clinical Neurosciences, University of Cambridge, Cambridge, United Kingdom, 6IRCCS Stella Maris, Pisa, Italy

MR fingerprinting (MRF) can be used to rapidly estimate quantitative parameters in MRI. However, the homogeneity of the transmission radiofrequency field (B1+) can introduce errors in the measurements. Here, we modified spiral MRF acquisitions and included the effects of B1+ directly in the reconstruction framework. We could obtain B1-corrected T1 and T2 maps without using an extra scan. These advances are demonstrated in human brain images at 7T.

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