Doctors normally use MRI to look inside the body to examine organs and tissue, for instance to find tumors and other abnormalities. Now, biological engineers in the US want to adapt the scanning technology to work on a much smaller scale. They want to use magnetic resonance imaging (MRI) as a "molecular imaging" tool to see genes at work in living brains and find out what effect they have on cognitive processes like memory and learning.The team working on this is at Massachusetts Institute of Technology (MIT).

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