Keywords: Hybrid & Novel Systems Technology, Hybrid & Novel Systems Technology, Cardiac MR, MR-compatible, Cardiac Gating, Cardiac Radar, Non-contact Sensing
Motivation: Conventional electrocardiography (ECG) multi-electrode setups are essential for cardiac MR (CMR) gating, but they are cumbersome and pose electrical safety risks to patients.
Goal(s): This study aims to investigate a feasible non-contact CMR gating approach using a MR-compatible doppler cardiac radar, and it can possibly offer improved patient comfort and flexibility.
Approach: An 886 MHz microstrip-patch-based MR-compatible cardiac radar was proposed, optimized, and fabricated, and it worked with a home-made FPGA module to communicate with the scanner to achieve real-time cardiac triggering.
Results: In-vivo scans validated the feasibility of the proposed approach, which was rigorously compared with CMR images via traditional ECG methods.
Impact: The proposed cardiac radar provides a non-contact alternative for cardiac gating in MRI. Future research may explore signal biological mechanisms and its additional applications in respiratory gating.
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