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Abstract #2785

Correcting Phase Errors from B0 Eddy Currents in Non-Cartesian Imaging

Ethan K. Brodsky1,2, Jessica L. Klaers2, Walter F. Block2,3

1Radiology, University of Wisconsin, Madison, WI, USA; 2Medical Physics, University of Wisconsin, Madison, WI, USA; 3Biomedical Engineering, University of Wisconsin, Madison, WI, USA

Overall consistency in image quality from non-Cartesian sequences is typically still not equivalent to that possible with Cartesian methods. One cause for this is phase errors from B0 eddy currents. While scanners actively maintain a stable field, this compensation is limited to longer time constants, so variation is still seen during gradient activity. We enhance our per-scan gradient calibration to additionally measure phase errors due to B0 eddy currents and measure and correct the phase errors for several multi-echo 3DPR acquisition. Phase variations of up to 45 are seen across a readout, but the resulting effects are typically negligible.