The distribution and extent of traumatic lesions were evaluated with MR imaging in 40 pateints with closed head injuries. The primary intraaxial lesions were classified into four main types, according to their topographical distribution within the brain ; cortical contusion(54%), diffuse axonal injury(35%), subcortical gray matter injury(4%), primary brain stem injury(7%). MR was found to be superior to CT and to be very useful in the detection of traumatic head lesions and T2W1 were most useful for lesion detection. But T1W1 proved to be also useful for detection of hemorrhage and anatomical localization.