Patent ID: 6369572
Filing Date: 2002-04-09
Classification: G01R

Abstract:
A magnetic resonance apparatus which is provided with a gradient device which includes:at least one gradient coil (3) for generating a magnetic gradient field in an imaging volume (29) of the apparatus by means of gradient current pulses, a power amplifier (7) for applying the gradient current pulses to the gradient coil (3), a control circuit (69) which is connected to the input of the power amplifier in order to supply the power amplifier with a control signal representing the gradient current pulses, said control circuit being provided with a signal input (33) for receiving an input signal wherefrom the control signal is derived, characterized in that between the signal input (33) of the control circuit (69) and a point preceding the input of the power amplifier (7) there is inserted a feed forward loop (57) which includes at least one filter (61, 63) whose impedance characteristic is the inverse of the impedance characteristic of at least one of the components traversed by the output current of the power amplifier.