What you need to know

What is MEG?

Magnetoencephalography (MEG) works by detecting the magnetic fields created by the brain's electric signals. These fields are a billion times smaller than the Earth's magnetic field, so MEG has to be carried out in a heavily shielded room. The person sits inside a 'helmet' of special sensors that detect the tiny magnetic signals produced by the brain. Magnetic fields are detected by extremely sensitive devices, using super-conducting detectors and amplifiers, also known as SQUIDs. The scanner, used to detect and amplify magnetic signals produced by the brain, does not emit radiation or use strong magnetic fields.
 

How IS MEG used?

MEG can be combined with scanning techniques to build up a detailed picture of a living, working brain and can be used to help better plan for brain surgery. In particular, MEG can provide accurate information about the cortex (the outer layer of the brain) because it is less sensitive to signals generated from deep within the brain, unlike an EEG. MEG can also 'see through' the skull and scalp more clearly, unlike for EEG where these impact the signals observed.

Is an MEG the right test for me?

This is something that needs to be carefully discussed with your physician. We focus on complex cases that require special attention before surgery can be considered. Our approach involves a detailed clinical consultation to best understand your epilepsy when interpreting your results.
 

Any other questions?

Head to our contact form here to email us and find out more …