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Contactless Stethoscope Enabled by Radar Technology.

Isabella Lenz¹, Yu Rong¹, Daniel Bliss¹

¹The Center for Wireless Information Systems and Computational Architectures (WISCA), Arizona State University, Tempe, AZ 85281, USA.

Bioengineering (Basel, Switzerland)

|February 25, 2023

Summary

This summary is machine-generated.

A new radar technology offers a contactless way to measure human heart sounds by detecting subtle skin vibrations. This innovative approach shows promise as a viable and potentially superior alternative to traditional contact-based methods.

Keywords:

MIMO cardiograph heart sound millimeter wave radar signal processing

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Area of Science:

Biomedical Engineering
Medical Device Technology
Cardiovascular Monitoring

Background:

Contact-based vital sign monitoring can be uncomfortable and pose infection risks.
Continuous monitoring of heart sounds is crucial for diagnosing various cardiac conditions.
Existing methods for measuring heart sounds require direct physical contact.

Purpose of the Study:

To introduce and evaluate a novel contactless method for measuring human heart sounds.
To compare the performance of the contactless radar technique against traditional contact-based methods.
To assess the feasibility and potential advantages of radar-based heart sound detection.

Main Methods:

Utilizing millimeter wave frequency-modulated continuous wave (FMCW) radar.
Employing multi-input multi-output (MIMO) beamforming techniques.
Capturing fine skin vibrations caused by cardiac activity.

Main Results:

The radar system successfully captured heart sounds through non-contact skin vibration detection.
Experimental comparisons demonstrated the strengths and limitations of both radar and contact-based techniques.
The contactless radar method proved to be a viable alternative for heart sound measurement.

Conclusions:

Contactless radar technology presents a promising advancement in cardiovascular monitoring.
This technique offers potential improvements in patient comfort and practitioner safety.
Radar-based heart sound measurement may offer superior performance in various clinical settings.