Research assistant professor Julie Brefczynski-Lewis, Ph.D., and her research team, are perfecting what they say is the world's first portable, wearable positron emission tomography (PET) scanner that obtains "live" internal depictions of the human brain working while a person walks or is involved in other physical movement. She unveiled her work at the annual meeting of the American Association for the Advancement of Science this weekend in Boston. 

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