Thompson used diffusion imaging, which measures the direction in which water diffuses through white matter, to show the speed of the connections.

Results 210 patients with transient ischemic attack, there are 119 patients with MR diffusion imaging examination showed abnormal cerebral ischemia, indicating positive rate(56.7%, 119/210);

The special M.R.I. technique, known as diffusion tensor imaging, is also being studied to help improve the diagnosis of concussions.