The scan lights up the breaks injuries leave deep in the brain.
It works much like x-rays show broken bones.
With more serious head injuries standard scans can't see beyond bleeding or swelling to tell if the brain's connections are damaged in a way it can't repair on its own.
This experimental scan could let doctors know exactly how serious a head injury is and help guide rehabilitation.
The technology, highlighted in the journal of Neurosurgery is called High Definition Fiber Tracking.