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functional magnetic resonance imaging: a technique that directly measures the blood flow in the brain, thereby providing information on brain activity
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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FMRI definition

Abbreviation for functional magnetic resonance imaging. In FMRI, a patient is placed in a high magnetic field and delicate measurements of magnetic fields associated with processes like blood flow are made. In this way, the functioning of organs like the brain can be monitored as they occur. (Compare MRI.)

Note: FMRI images are used to determined which parts of the brain “light up” when a function such as speech or recognition is performed.
The New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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