Abstract #1697

A Beamforming-Based Coil Combination Method to Reduce Streaking Artifacts and Preserve Phase Fidelity in Radial MRI

Shu-Fu Shih^1,2 and Holden H. Wu^1,2

¹Department of Radiological Sciences, University of California Los Angeles, Los Angeles, CA, United States, ²Department of Bioengineering, University of California Los Angeles, Los Angeles, CA, United States

Synopsis

Radial acquisition can be sensitive to hardware imperfections such as gradient non-linearity and B0 field inhomogeneity. This usually becomes accentuated in areas more distant to the isocenter and can lead to streaking artifacts even when nominally fulfilling Nyquist criteria. Previous work demonstrated beamforming-based methods for radial streaking reduction, but did not explicitly consider phase and did not evaluate the artifact-suppression performance on phase explicitly. In this work, we developed a new beamforming formulation based on minimum-variance distortionless response (MVDR) that can suppress streaking artifact while preserving accurate phase information

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