functional magnetic resonance imaging

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Magnetic resonance imaging that provides three-dimensional images of the brain showing areas of increased blood flow that correlate with specific brain functions.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun medicine A form of magnetic resonance imaging that records the flow of blood to areas of the brain when the patient is undertaking a specific neural activity

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a form of magnetic resonance imaging of the brain that registers blood flow to functioning areas of the brain