Tiny sensor could guide needles through the body, monitor health from afar

Go for a biopsy these days and chances are your doctor will have to knock you out, slice part of you open, and fish around for the needed tissue. But what if a tiny sensor could guide a needle instead, mapping out your insides as it goes, all while you watch on a video screen?

“The design of the sensor is really smart and quite creative—it thinks outside the box,” says Montserrat Calleja Gómez, a physicist who develops nanomechanical sensors at the Institute of Micro and Nanotechnology in Madrid who was not involved with the study. If the sensor is swallowed, it could also monitor real-time changes inside the body, such as whether people with gastrointestinal issues are responding to medications or experiencing flare-ups, the team says.

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