DRIVE CIRCUITRY FOR FIELD-GENERATING COIL OF MAGNETIC RESONANCE IMAGING SYSTEM

摘要

Feedback control is provided for the resonant circuit (22) formed by the capacitive element (12) and field-generating coil (10) of a MRI system. A current sensing circuit (24) is connected to the resonant circuit for sensing the current flowing through the coil (10). Feedback circuitry compares the sensed current to a reference signal (28) (e.g., the desired sinusoidal current waveform), and provides an output signal prescribing the power to be supplied to the resonant circuit (22) to cause the current flowing through the coil to more closely approximate the reference current.