a technique using the phenomenon of nuclear magnetic resonance (especially of protons) to produce tomographic or three-dimensional images of the…

magnetic resonance imaging; (also) a unit for producing images in this way.

magnetic resonance imaging carried out to study the function of a part of the body, typically by measuring changes in blood flow; abbreviated fMRI.

= functional magnetic resonance imaging n. at functional, adj. n.compounds; (also) a scan carried out using this technique.