CPC G01R 33/56518 (2013.01) [G01R 33/58 (2013.01)] | 23 Claims |
1. A method for operating a magnetic resonance imaging (MRI) system by generating a target gradient field in accordance with a pulse sequence, the pulse sequence comprising a gradient waveform associated with the target gradient field, the method comprising:
compensating for presence of eddy currents during operation of the MRI system at least in part by correcting the gradient waveform using a first nonlinear function of a characteristic of the gradient waveform to obtain a corrected gradient waveform;
determining a shifted B0 magnetic field strength waveform using the corrected gradient waveform and a second nonlinear function describing effects of an amplitude of the gradient waveform on a B0 magnetic field of the MRI system;
determining information indicative of variation of an operating frequency of an RF coil of the MRI system over a duration of the pulse sequence based on the shifted B0 magnetic field strength waveform, the information configured to govern a transmit and/or receive frequency of the RF coil while the MRI system is operated in accordance with the pulse sequence; and
operating the MRI system in accordance with the corrected gradient waveform to generate the target gradient field.
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