“Functional magnetic resonance imaging – fMRI for short – enables researchers to create maps of the brain’s networks in action as they process thoughts, sensations, memories, and motor commands. Since its debut in experimental medicine 10 years ago, functional imaging has opened a window onto the cognitive operations behind such complex and subtle behavior as feeling transported by a piece of music or recognizing the face of a loved one in a crowd. Now fMRI is also poised to transform the security industry, the judicial system, and our fundamental notions of privacy.”