Magnetoencephalography

This approach was just brought again to my attention.  Have been asked how it could be applied to the same kinds of diagnostic queries as EEG.  And if it has ever been applied to the same problems that have been addressed by Neuromarketing.  Links to such studies?  The article below describes and compares the two methods.

Intro in the Wikipedia:

Magnetoencephalography (MEG) 

Magnetoencephalography (MEG) is a functional neuroimaging technique for mapping brain activity by recording magnetic fields produced by electrical currents occurring naturally in the brain, using very sensitive magnetometers. Arrays of SQUIDs (superconducting quantum unit interference devices) are currently the most common magnetometer, while the SERF (spin exchange relaxation-free) magnetometer is being investigated for future machines.[1][2] Applications of MEG include basic research into perceptual and cognitive brain processes, localizing regions affected by pathology before surgical removal, determining the function of various parts of the brain, and neurofeedback. This can be applied in a clinical setting to find locations of abnormalities as well as in an experimental setting to simply measure brain activity.[3]... '