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Abstract #0523

Model-based Spiral Trajectory Correction using Scanner-specific Gradient Calibration

Craig H. Meyer1, Samuel W Fielden1, Josef Pfeuffer2, John P. Mugler III3, Alto Stemmer2, and Berthold Kiefer2

1Department of Biomedical Engineering, University of Virginia, Charlottesville, VA, United States, 2Application Predevelopment, Siemens Healthcare GmbH, Erlangen, Germany, 3Department of Radiology & Medical Imaging, University of Virginia, Charlottesville, VA, United States

The purpose of this work was to apply a spiral k-space characterization method to a variety of scanner models to assess the consistency of characterization parameters and the ability of the method to yield high-quality spiral images on the different scanners. Characterization of gradient-system performance on 11 MR scanners yielded only minor variation in parameter values among scanners, and in all cases model-based correction of spiral trajectories yielded very similar image results to reconstruction based on measured trajectories. These results suggest that model-based reconstruction may represent a viable approach for obtaining high-quality spiral images without the need for characterization of specific spiral-trajectory implementations.

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