From the Klinik für Radiologie und Neuroradiologie (J.H.), UKSH Campus Kiel, Germany; Lysholm Department of Neuroradiology (R.L.) and Department of Neurosurgery (L.W.), National Hospital for Neurology and Neurosurgery; and Brain Repair & Rehabilitation Department (I.D.), UCL Institute of Neurology, Queen Square, UK.