Abstract #4104

Self-Calibrated Soft Gating for Respiratory Resolved 3D+Time Lung ZTE

Anne Menini¹, Peng Lai¹, Graeme C McKinnon², and Florian Wiesinger³

¹Global MR Applications and Workflow, GE Healthcare, Menlo Park, CA, United States, ²Global MR Applications and Workflow, GE Healthcare, Waukesha, WI, United States, ³Global MR Applications and Workflow, GE Healthcare, Munich, Germany

3D + Time lung ZTE reconstruction can provide combined anatomical imaging and motion extraction for RTP and PET/MR-type applications. In this work, we propose a soft-gating method for non-Cartesian imaging, via a solver preconditioner, to improve the sharpness and SNR of 4D ZTE. No a priori knowledge is used for the soft gating weights, as they are self-calibrated based on coil-image bin to bin similarities. The proposed soft gating method provides a SNR gain while maintaining resolution.

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