Concussion patients can develop persistent, sometimes severe symptoms as a result of their head injury, but traditional tests often fail to identify which patients are most at-risk. Now, a group of international researchers has found a way to improve the odds. Typically, doctors observe patients when they come to the hospital with a possible brain injury, and they may order a CT scan to check for bruising, bleeding, or swelling. But the new study, published in the Lancet-affiliated eClinicalMedicine00330-4/fulltext), found that another type of brain scan, known as diffusion tensor imaging MRI …