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Abstract #4979

MM-Wave Radar Vitals Sensing: Towards Non-Contact Cardiac and Respiratory Gating for MRI

Hemal Arora1, Fraser Robb2, Shreyas Vasanawala3, John Pauly1, and Greig Scott4
1Stanford University, Stanford, CA, United States, 2GE Healthcare, Aurora, OH, United States, 3Radiology, Stanford University, Stanford, CA, United States, 4Electrical Engineering, Stanford University, Stanford, CA, United States

Synopsis

Keywords: Hybrid & Novel Systems Technology, New Devices, Radar

Motivation: Present day cardiac and respiratory gating require cabled sensors that impede patient workflow. A non-contact sensing method is needed.

Goal(s): Our goal is to determine whether non-contact mm-wave radar neck vessel motion sensing can distinguish the cardiac cycle from respiratory motion with a long term aim of non-contact gating.

Approach: We updated a 4 channel 24GHz CW radar system using dual Analog Discovery Pros for chest/neck data capture and integrated ECG monitoring with Python scripting.

Results: Respiratory motion remains easily detected with high SNR. Neck vessel motion creates unique waveforms with carotid notch and jugular venous pulse contributions variably mixed.

Impact: MM-wave radar is a promising candidate for non-contact sensing of cardiac and respiratory cycles, with potential applications in non-contact motion gating in pediatric MRI and synchronizing on pulsatile motion of the cerebrum in neuroimaging.

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Keywords