A system and method for active MR tracking includes a magnetic resonance
imaging (MRI) system having a plurality of gradient coils positioned
about a bore of a magnet, an RF coil assembly positioned in the bore, and
a pulse module. The MRI system also includes a polarization reversal
switch controlled by the pulse module to transmit RF signals to the RF
coil assembly coupled to the polarization reversal switch and an RF
switch controlled by the pulse module to transmit the RF signals to the
polarization reversal switch.