Impulse response function (IRF) harvesting is a powerful technique for gradient characterization. In this study a field monitoring system was utilized to characterize a head-only, high-performance gradient coil (MAGNUS), enabling expansion of the spatial response pattern into higher order spherical harmonics. The predictive power of IRF-estimated waveforms and field evolution is demonstrated by comparing to nominal and active field monitored approaches for arbitrary gradient waveforms. The calculated modulation function indicated good correspondence for arbitrary waveforms and k-space trajectories varying with slew rate, amplitudes and number of interleaves.
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