A team of researchers in Canada and China are working on a revolutionary new way to track blood pressure: a selfie. The teams, based at the University of Toronto and the Affiliated Hospital of Hangzhou Normal University, just published a proof of concept that allows smartphone users to track blood pressure by taking a short video. “We’re using a tech called transdermal optical imaging,” Kang Lee, a developmental psychologist at the University of Toronto and the lead author of the paper told Quartz. The idea is to use light emitted by a smartphone camera to detect proteins as it bounces…

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