Magnetoencephalography (MEG) equipment. (IMAGE) Radiological Society of North America Caption Magnetoencephalography (MEG) equipment. Pre- and post-season resting-state MEG data was collected from 91 high school football players, of whom 10 were diagnosed with a concussion. MEG is a neuroimaging technique that measures the magnetic fields that the brain’s electrical currents produce. Credit Radiological Society of North America (RSNA) Usage Restrictions May use with credit. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.