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The increased use of electronic cigarettes and vaping products has increased the need to better understand how and if addiction to these products is different than in traditional cigarettes. One way to objectively measure addictive potential is through changes in the brain, but researchers say a limited number of methods currently exist to deliver the vapor (called aerosol) during magnetic resonance imaging, commonly called MRI. [...] Andrea Hobkirk's prototype device is designed to do just that—delivering up to four different aerosols during MRI scanning and mimicking the everyday use of a vaping device.