Abstract #1853

Robust Self-Gated Free-Breathing 3D Cardiac MRI Using DC Signals and Virtual Coils

Xinwei Shi^1,2, Joseph Y Cheng^1,2, Michael Lustig³, John M Pauly², and Shreyas S Vasanawala¹

¹Radiology, Stanford University, Stanford, CA, United States, ²Electrical Engineering, Stanford University, Stanford, CA, United States, ³Electrical Engineering and Computer Science, UC Berkeley, Berkeley, CA, United States

In cardiac MRI, self-gating using the DC signal provides a promising alternative to EKG gating. However, the DC signal is often affected by other moving structures in the FOV, such as the liver, which degrades the accuracy of the extracted cardiac triggers. In this work, we demonstrate the use of virtual coils to focus the DC signal on cardiac motion and to provide a robust and generalized self-gating approach for 3D cardiac MRI. In free-breathing 4D-Flow scans of pediatric subjects, the proposed method improved the accuracy of self-gating triggers, and the self-gated images showed comparable quality with EKG gated reference.

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