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BPN844: Wireless Sub-Millimeter Temperature Sensor for Continuous Temperature Monitoring in Tissue

Project ID BPN844
Start Date Tue 2016-Aug-23 21:44:31
Last Updated Sun 2017-Jan-29 18:28:37
Abstract Several phenomena within the body have a unique temperature signature. These unique fluctuations in temperature accompanying physiology can be leveraged for the monitoring of disease states and to confirm normal organ function. The current gold standard for thermal imaging is a technique known as infrared (IR) thermography. However, current methods of thermography are limited in depth and rely heavily upon heat transfer models of the body that can be imprecise even with carefully calibrated equipment. Here, we develop and demonstrate the viability of a miniature temperature sensing modality employing ultrasonic backscatter modulation for wireless communication that is designed to transmit temperature data from deep tissue in vivo. We have demonstrated that sensor motes as small as nearly 500 um in their largest dimension can be assembled. Furthermore, we have found that our system is capable of resolving temperature changes of less than 0.5C, which is significant in assessing tissue temperature changes in vivo for monitoring and diagnostic purposes. Due to the minimal attenuation of ultrasound in tissue compared to other modalities, our system is capable of deep tissue implantation; allowing for temperature data to be collected from locations in the body that were previously inaccessible using current thermography methods. We anticipate our sensor to be used as a tool that enables physicians to remotely monitor patients that are at risk of experiencing tissue ailments.
Status Continuing
Funding Source DARPA
IAB Research Area Wireless, RF & Smart Dust
Researcher(s) B. Arda Ozilgen
Advisor(s) Michel M. Maharbiz
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