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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