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Abstract #4943

ΦFA CUP: PHase Based Flip Angle Calibration Using the P0 Pulse for Proton MRI at 7T

Davide Santoro1, Tomasz Lindel, 1,2, Matthias Dieringer, 1,3, Wolfgang Renz, 1,4, Thoralf Niendorf, 1,5

1Berlin Ultrahigh Field Facility, Max-Delbrueck Center for Molecular Medicine, Berlin, Germany; 2 (PTB), Physikalisch Technische Bundesanstalt, Berlin, Germany; 3Franz-Volhard Klinik, Clinic for Cardiology, Charit Berlin, University Medicine, Berlin, Germany; 4Siemens Healthcare, Erlangen, Germany; 5Experimental and Clinical Research Center (ECRC), Charit Campus Buch, Humboldt-University, Berlin, Germany

We demonstrate the applicability of a rapid 3D-B1+ mapping method for proton MRI at 7T. The method is based on the acquisition of two phase images where the effective flip angle is encoded in the phase of the non-slice selective rectangular composite pulse used as excitation in a gradient recall echo. On phantoms our method compares well with the double angle method, and is approximately 40 times faster. 3D FA map of human brain acquired in 102s are presented.