<\/p>\n
The circuit detects temperature within 0.01 \u00b0C and can be powered with a 1.55-volt coin cell battery. A strategy known as backscattering further cuts energy consumption, allowing most of the power requirements to be outsourced to an antenna outside the body. It emits an ultra-high-frequency radio wave, which is modulated by an antenna within the sensor and sent back to the external one. By interpreting the changes in the radio wave, the external antenna can calculate the temperature value.<\/p>\n
The result is \u201cthe smallest ingestible capsule that we have seen for temperature-\u00adsensing paradigms,\u201d says Saransh Sharma, a former MIT postdoc now at the University of Cambridge, who is lead author of a paper on the work.\u00a0<\/p>\n
The researchers envision using it to monitor infection, observe patients during and after anesthesia, track fevers in children, help mark ovulation, and more. It could also be used to monitor athletes, soldiers, or anyone else exposed to extreme temperatures.\u00a0<\/p>\n
\u201cA sensor like this gives us\u00a0the ability to monitor infections and identify them early,\u201d says Giovanni Traverso, an associate professor of mechanical engineering and one of the paper\u2019s senior authors, along with MIT provost Anantha Chandrakasan. \u201cThat\u2019s very relevant, particularly for at-risk populations like people who are immunosuppressed.\u201d Ultimately, he hopes, it could replace other types of thermometers for everyone.<\/p>\n<\/p><\/div>\n
#temperature<\/p>\n","protected":false},"excerpt":{"rendered":"
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