Purpose: To analyze the characterization of traumatic brainstem injury by CT & MR Materials and Methods : CTand MR studies of 10 patients with traumatic brainstem lesion in MR were retrospectively reviewed, particularlyattended to location, signal intensity and associated lesions. Results : CT failed to depict 8 of 10 brainstemlesions. All lesions were detected in MR images with T2-weighted images showing higher detection rate (n=10)(100%)than T1-weighted images(n=3)(30%) or CT(n=2)(20%). The brainstem lesions located in the dorsolateral aspects ofthe rostral brainstem(mid brain and upper pons)in 7(70%) cases, in ventral aspects of rostral brain in 2(20%)cases and in median portion of pons in 1(10%) case. Corpus callosal(n=5), lobar white matter(n=5) diffuse axonalinjury, and 2 hemorrhagic lesions in basal ganglia were the associated findings. Conclusion : MR imaging is morehelpful than CT in the detection of brainstem injury, especially T2 weighted images. Primary brainstem lesionswere typically located in the dorsolateral aspect of rostral brainstem(midbrain and upper pons). corpus callosumand white matter lesions were frequently associated.