Doctors from Weill Cornell Medical College and University of California have found evidence which links memory loss to brain damage following mild traumatic brain injury. This recent discovery can prove helpful in diagnosing when a routine concussion can cause lasting cognitive problems. Patients who experience concussion following a head injury show no signs of damage in a traditional MRI scan or CT. On passing the basic neurological test, they are sent back home without a treatment. Researchers examined diffusion tensor imaging (DTI). This advanced form of MRI facilitates the study of microscopic movement of water molecules within the white matter of brain.