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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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