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Abstract #3239

High Accuracy Heartbeat Detection with 433MHz CW-Doppler Radar for MRI Application

Yuxin Wu1, John Pauly2, and Greig Scott2
1Department of Electronic Engineering, Tsinghua University, Beijing, China, 2Department of Electrical Engineering, Stanford University, Stanford, CA, United States


This work assesses heartbeat detection by continuous-wave (CW) Doppler radar using low and high carrier frequencies of 433MHz and 5GHz as options for non-contact vitals sensing in MRI. The experimental results show that using the amplitude of received complex signals in low frequency 433MHz-detection can perform as well as 5GHz-detection due to near field interactions within a 20cm range, with similar heartbeat detection efficacy.

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