Keywords: Flow, System Imperfections: Measurement & Correction, Phase Error
Motivation: Background phase errors in PC-MRI include eddy currents and mechanical oscillations. Relative contributions over a wide range of velocity encoding gradients (VENCs) remain underexplored.
Goal(s): To evaluate background phase errors across clinically relevant VENCs, characterizing the impact of eddy currents and mechanical oscillations.
Approach: Waveforms with a range of VENCs were generated, and the gradient impulse response function was used to predict phase errors as a sum of eddy current and mechanical oscillation effects. Phantom experiments across different VENCs were conducted.
Results: Eddy current effects dominated lower VENCs. Between approximately 52 and 92 cm/s the phase error was largely oscillatory.
Impact: The necessary correction for background phase errors depends on the VENCs, which explains why errors are protocol dependent.
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