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Medical monitoring via webcam

http://www.economist.com/blogs/babbage/2013/03/remote-monitoring

A team of researchers at Xerox is working on technology that would allow doctors to obtain patients’ vital signs using a simple webcam. Already, the team is testing use of the technology to monitor the pulse rate of premature babies and to track irregular heartbeats in patients suffering from arrhythmia.

By applying further signal-processing algorithms to the images, doctors can get a read-out of a baby’s blood-oxygen level. If the camera can see more than one part of the child it can also measure that child’s blood pressure. It does this by recording the time each pulse caused by the heartbeat takes to arrive in different arteries.

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