Magnetic field shimming in MRI with controlled polarization and SAR limitation

In this work we presented a new optimization procedure that allows one to reduce SAR in MRI exam and control the polarization. Contrary to other shimming procedures controlling the polarization of the field consent us to control the power delivered to the entire system. Consequently SNR is improved and the proposed method would be used also in 1.5 T and 3 T MRI. Such kind of technique was tested in a simple scenario and it could be extended to a realistic one. We noticed that Bi shimming would cause a decreasing in the flip angle value as reported. Further the application of such kind of technique to a real case will be investigated in future works.