Researchers from the University of Cambridge have been testing out an advanced form of MRI known as diffusion tensor imaging (DTI), which they say can “substantially improve” existing methods for finding out if someone with a concussion is likely to develop a potentially life-changing “hidden disease.” We can’t overstate the importance of looking after your brain. One of the biggest causes of concussions is road accidents, with cyclists who don’t wear a helmet at the greatest risk. It’s not uncommon for victims of concussions to suffer severe fatigue, poor memory, headaches, and mental health …