Food and Drug Administration (FDA) has approved EEG technology to test the brain for ADHD. For more information, please read the July 15th, 2013 New York Times article “Brain Test to Diagnose A.D.H.D. Is Approved” by Sabrina Taverinse.
Link: http://www.nytimes.com/2013/07/16/health/brain-test-to-diagnose-adhd-is-approved.html?emc=eta1&_r=0