Device and method for prospective correction for gradient pulse shape distortions in mri imaging

Abstract

For a gradient system () for a magnetic resonance imaging system () a solution for improving the control of gradient fields for a higher image quality shall be created. This is achieved by a gradient system () the gradient system () comprising: at least one gradient coil () for generating the gradient magnetic field when supplied with electrical current, wherein the gradient coil () is configured for generating at least one selection gradient magnetic field by transmitting selection gradient pulses, wherein the gradient system () comprises a gradient coil amplifier () configured for supplying the electrical current to the gradient coil (), the gradient system () further comprising a current sensor system () configured for sampling an electrical current supplied to the gradient coil () by the gradient coil amplifier (), wherein the gradient system () is further configured to obtain an actual selection gradient pulse shape () of the selection gradient magnetic field by applying a current to field modulation transfer function (CGMTF) to the sampled electrical current, which enables a magnetic resonance examination system () to compensate for the deviation of the actual selection gradient pulse shape () from an input selection gradient pulse shape () by adjusting radio frequency pulses () emitted simultaneously with the selection gradient pulses. The present invention also concerns a magnetic resonance imaging system (), a method of operating a gradient system () and a computer program product.