A wearable ultrasound sensor provides real-time cardiac imaging Imaging Sensor Wearables Ultrasound Cardiovascular Disease DeepLearning Exercise Heart Skin UCSanDiego Nature
The wearable ultrasound sensor is roughly the size of a postage stamp, can be worn for up to 24 hours, and works even during strenuous exercise. Image Credit: Xu Laboratory, UC San Diego Jacobs School of Engineering
A center resonant ultrasound frequency of 3 MHz was chosen for the imaging of deep tissue while accounting for spatial resolution and penetration depth. Eutectic gallium-indium liquid metal and styrene-ethylene-butylene-styrene were used to build the multilayered, high-density, stretchable electrodes, which made the device compact. Additionally, each of the piezoelectric transducer elements comprises an anisotropic 1-3 piezoelectric composite coupled with a silver-epoxy-based backing layer.
Related StoriesThe wide-beam compounding approach was used to analyze the special resolution of the device and to evaluate the contrast-to-noise ratio and dynamic range of the device. The performance of the device was compared with that of a commercial echocardiograph device.
Results The results reported a substantial improvement in the accurate monitoring of cardiac performance through the wearable ultrasonic device. The wide bandwidth, low dielectric loss, increased electromechanical coupling, and almost zero crosstalk ensured that the device has excellent electromechanical properties. The Young’s modulus of the device was comparable to that of human skin and combined with the increased stretchability.
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You might be able to write your own Apple AR/VR headset appsDave is a freelance tech journalist who has been writing about gadgets, apps and the web for more than two decades. Based out of Stockport, England, on TechRadar you'll find him covering news, features and reviews, particularly for phones, tablets and wearables. Working to ensure our breaking news coverage is the best in the business over weekends, David also has bylines at Gizmodo, T3, PopSci and a few other places besides, as well as being many years editing the likes of PC Explorer and The Hardware Handbook.
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