Craniocerebral trauma is one of the most frequent and grave forms of neurologic disease. Proper therapeuticmanagement can only used on correct diagnosis and appreciation of the temporal course of the disease process. CTrepresents a major breakthrough in the investigation of head injuries. It not only reveals promptly, accurately, and noninvasively the trauma-related abnormalities that were previously demonstrated only by invasive radiologicmethods, but also shows intracranial abnormalites that were previously recognized only by operation or autopsy. Moreover, through sequential studies, CT reveals the time course of various trauma-related processes. For thepurpose of establishing the diagnosis of the various traumatic lesions and the prognostic value, the results ofsequential CT examinations were systematically compared and correlated with clinical and operative findings. Thisreport deals with the resuls obtained on 1288 patients studied at the Severance Hospital of the Yonsei Universityduring the past 3 years. The brief resuls are as follows; 1. The CT scanning from acute head trauma(includingsequential studies) is the single most common entity which accounts for about 15% in consecutive 10000 CTscannings. 2. The incidence of skull fracture is 31.4%(405/1288), and intracranial abnormality is more common inpatients with fracture (73.8%) than patients without fracture (25%). But there is no significant correlation tothe level of consciousness and degree of intracranial abnormality. 3. Review of CT findings reveals several typesof lesion: normal CT exam(59.1%), hemorrhagic contusion or brain swelling (17.3%), intracerebral and extracerebralhematomas. 3. Review of CT findings reveals several types of lesion: normal CT exam(59.1%), hemorrhagic contusionor brain swelling (17.3%), intracerebral and extracerebral hematomas. 4. Contrast infusion study reveals to aid inidentifying isodense extracerebral hematoma by the resuls of contrast enhancement in 37% of acute epiduralhematoma and several cases of isodense subdural hematoma in follow-up study. 5. The occurance of delayedintracranial hematoma, 9 intra- and 10 extracerebral, is more frequent than previously reported. Most of delayedintracranial hematoma developed within 4 weeks (94.6%) after trauma and is associated with a poor outcome. 6. The mortality rate for intracerebral (16.8%), subdural (23.5%) and epidural hematoma(8%) were lower than in seriespreceded computed tomography.