How we can use light to see deep inside our bodies and brains | Mary Lou Jepsen

In a series of mind-bending demos, inventor Mary Lou Jepsen shows how we can use red light to see and stimulate what's inside our bodies and brains. Taking us to the edge of optical physics, Jepsen unveils new technologies that utilize light and sound to track tumors, measure neural activity and could eventually replace the MRI machine with a cheaper, more efficient and wearable system. Check out more TED Talks: http://www.ted.com

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