Susceptibility weighted imaging in the evaluation of hemorrhagic diffuse axonal injury

Diffuse axonal injury(DAI)is axonal and small vessel injury produced by a sudden acceleration of the head by an external force,and is a major cause of death and severe disability(Paterakis et al.,2000).Prognosis is poorer in patients with apparent hemorrhage than in those without(Paterakis et al.,2000).Therefore,it is important to identify the presence and precise position of hemorrhagic foci for a more accurate diagnosis.CT and magnetic resonance imaging(MRI)have long been applied in the diagnosis