Fast B1+ Mapping with a Function Fit Using a Reduced Number of Support Points

Martin Janich^1,2, Olaf Dssel¹, Sascha Khler², Peter Ullmann²

Precise B1+ mapping can be performed by fitting of a function to data acquired with different flip angles. Here a reduction of the number of support points used for the fit is proposed, resulting in a significant decrease in scan time. With the fewer support points the same precision was obtained within a limited dynamic range. This dynamic range for correct measurements was determined in simulations. The approach allows fast B1+ mapping and was successfully applied in phantoms and in vivo.