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.