Abstract #3921

Magnetic Field Monitoring of Spiral Echo Train Imaging

Craig H Meyer¹, Gudrun Ruyters², John P. Mugler III³, Samuel W. Fielden⁴, Berthold Kiefer⁵, and Josef Pfeuffer⁵

¹Biomedical Engineering, University of Virginia, Charlottesville, VA, United States, ²Physics, Siemens Healthineers GmbH, Erlangen, Germany, ³Radiology & Medical Imaging, University of Virginia, Charlottesville, VA, United States, ⁴Geisinger Health System, Lewisburg, PA, United States, ⁵Application Development, Siemens Healthineers GmbH, Erlangen, Germany

The goal of this study was to characterize the k-space trajectories of a spiral echo train pulse sequence using a dynamic field camera. The spiral trajectories were quite repeatable, with typical measured error less than 0.01% of the maximum k-space magnitude. This was true for constant-density, dual-density, and spiral-in/out trajectories. A somewhat larger error was typically observed in the first echo. Overall, this study demonstrates that 3D spiral echo train imaging using the same k-space estimation method for all echoes was sufficient to achieve high image quality.

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