The sensor sends out its location as it moves through the GI tract, revealing where slowdowns in digestion may occur. Engineers at MIT and Caltech have demonstrated an ingestible sensor whose location can be monitored as it moves through the digestive tract, an advance that could help doctors mor
Traverso is one of the senior authors of the new study, along with Azita Emami, a professor of electrical engineering and medical engineering at Caltech, and Mikhail Shapiro, a professor of chemical engineering at Caltech and an investigator of the Howard Hughes Medical Institute.
“Because the magnetic field gradient uniquely encodes the spatial positions, these small devices can be designed in a way that they can sense the magnetic field at their respective locations,” Sharma says. “After the device measures the field, we can back-calculate what the location of the device is.”
. It also has a large field of view, which is crucial for human and large animal studies,” Emami says. Next, the researchers performed tests using a single ingestible sensor along with an external sensor attached to the skin. By measuring the distance from each sensor to the coils, the researchers showed that they could track the ingested sensor as it moved from the stomach to the colon and then was excreted. The researchers compared the accuracy of their strategy with measurements taken by X-ray and found that they were accurate within 5 to 10 millimeters.
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