App Reads Blood Pressure from Selfie Video

App Reads Blood Pressure from Selfie Video
Checking your blood pressure could one day be as easy as taking a selfie with your smartphone.

The new app, developed by a team from the University of Toronto, relies on transdermal optical imaging (TOI)—and was borne out of an idea for a contact-free lie detector. The app takes advantage of the smartphone’s ability to detect red light reflected from the hemoglobin beneath the skin, which an algorithm then uses to measure the subject’s blood pressure level. The test requires only a two-minute video of the subject’s face, and can measure three types of blood pressure with a 95 to 96 percent accuracy.

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