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Abstract #4511

Routine B0 eddy current measurements with TOPPE for more robust spiral imaging

Jon-Fredrik Nielsen1, Gopal Nataraj2, Jeffrey Fessler1, and Douglas Noll1

1University of Michigan, Ann Arbor, MI, United States, 2Memorial Sloan Kettering Cancer Center, New York, NY, United States

Spiral imaging is an SNR- and time-efficient alternative to conventional cartesian MRI, but is relatively sensitive to gradient system imperfections. Unfortunately, measuring the k-space trajectory and B0 eddy currents for a particular spiral readout is cumbersome and not routinely performed. We propose to leverage the TOPPE development environment for rapid pulse sequence prototyping to easily measure both k-space trajectory and B0 eddy currents using “pencil-beam” acquisitions. To demonstrate this setup, we obtained k-space and B0 measurements of a pair of spiral-in and spiral-out readouts. We show that compensating for B0 eddy currents can improve image quality, and that TOPPE provides a convenient platform for these types of measurements.

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