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Wearable ‘Microbrewery’ Saves Human Body From Radiation Damage

August 13, 2018 By Purdue University

The same way that yeast yields beer and bread can help hospital lab workers better track their daily radiation exposure, enabling a faster assessment of tissue damage that could lead to cancer.

But rather than building portable cellars or ovens, Purdue University researchers have engineered yeast “microbreweries” within disposable badges made of freezer paper, aluminum and tape. Simply adding a drop of water activates the yeast to show radiation exposure as read by an electronic device.

On a commercial level, the readout device could one day be a tablet or phone. The badge could also be adapted in the future for nuclear power plant workers and victims of nuclear disasters.

“You would use the badge when you’re in the lab and recycle it after you’ve checked your exposure by plugging it into a device,” said Manuel Ochoa, a postdoctoral researcher in Purdue’s School of Electrical and Computer Engineering. 

Radiology workers are regularly exposed to low doses of radiation when they obtain patient imagery, such as X-rays. While protective gear largely keeps workers within a safe range of radiation exposure, absorbing a little bit is still inevitable.

Radiation doses creeping above regulated guidelines pose risk for developing conditions such as cancer, cataracts, skin irritation or thyroid disease.

“Currently, radiology workers are required to wear badges, called dosimeters, on various parts of their bodies for monitoring their radiation exposure,” said Babak Ziaie, Purdue professor of electrical and computer engineering. “They wear the badges for a month or two, and then they send them to the company that made them. But it takes weeks for the company to read the data and send a report back to the hospital. Ours give an instant reading at much lower cost.”

A team of Purdue researchers, including Rahim Rahimi (left) and Manuel Ochoa (right), proposes using yeast fermentation to more quickly detect biological radiation damage. (Purdue University image/Kayla Wiles)

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