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Abstract #2989

Artifact Reduction in 3D Radial Whole-Heart Imaging Using Slab-Selective RF Excitation

Jianing Pang1, Davide Piccini2, Christoph Forman3, and Michaela Schmidt3

1Siemens Medical Solutions USA Inc, Chicago, IL, United States, 2Advanced Clinical Imaging Technology, Siemens Healthcare AG, Lausanne, Switzerland, 3Siemens Healthcare, Erlangen, Germany

To date, most 3D radial kooshball imaging implementations had used non-selective (NS) radiofrequency pulses for volumetric excitation. However, given the undersampled nature of radial imaging, signal from excited regions in the periphery increases the streaking level in the central area of the field-of-view. In this work, we implemented slab-selective (SS) excitation for 3D radial whole-heart imaging. Results on 10 volunteers showed that SS excitation improved mean apparent signal- and contrast-to-noise ratio by 24% and 40%, respectively, with a mean scan time increase of 26% due to longer TR.

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