Abstract #0433

Spiral MRF at 7T with simultaneous B1 estimation

Guido Buonincontri¹, Rolf Schulte², Mirco Cosottini^3,4, Stephen Sawiak⁵, and Michela Tosetti^4,6

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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