Brain imaging: fMRI 2.0

one led by Seiji Ogawa at Bell Laboratories in Murray Hill, New Jersey, the other by Kenneth Kwong at Massachusetts General Hospital in Charlestown, slid a handful of volunteers into giant magnets. With their heads held still, the volunteers watched flashing lights or tensed their hands, while the research teams built the data flowing from the machines into grainy images showing parts of the brain illuminated as multicoloured blobs. The results showed that a technique called functional magnetic resonance imaging (fMRI) could use blood as a proxy for measuring the activity of neurons — without the injection of a signal-boosting compound. It was the first demonstration of fMRI as it is commonly used today, and came just months after the technique debuted — using Functional magnetic resonance imaging is growing from showy adolescence into a workhorse of brain imaging. f MR I 2 .0

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