Patent ID: 8228064

Claim:
Magnetic field gradient generating system for a NMR/MRI system, comprising at least one set of gradient coils, preferably arranged according to the three axes X, Y, Z of a spatial referential system, and controlled power supplying means for said gradient coils, said power supplying means comprising, for each gradient coil, a converter/amplifier module, said modules being fed with pulse sequences of digital gradient data provided as word streams by an adapted gradient data generator according to a pulse program, each arrangement of a gradient coil and a converter/amplifier module forming a gradient channel, gradient generating system ( 1 ) characterised in that said controlled power supplying means ( 3 ) also comprise an automatic blanking system ( 8 ) which scans the gradient data words sent to the [converter ( 4 )/amplifier ( 5 )] modules ( 6 ) and, according to the sensed values, selectively generates blanking signals to be applied to said modules ( 6 ) in order to disable the power stages of their respective amplifiers ( 5 ) connected to the gradient coils ( 2 ), when no current is to be fed to said coils ( 2 ).