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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