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目的：评价与提高ＣＴ在颅脑外伤检查和诊断中的敏感性和准确性。材料和方法：分析３１１例颅脑外伤患者的临床特征、ＣＴ检查时机和ＣＴ表现，探讨颅脑外伤的不同类型，找出合理的ＣＴ检查和复查时机。结果：ＣＴ平扫极易显示颅脑外伤的各种病理改变：硬膜下和硬膜外血肿、脑挫裂伤、脑内血肿、蛛网膜下腔出血和渗液。根据病变的发展可分为：立即损伤（２４２）、延迟损伤（５６）和假阴性损伤（１３）。根据病变部位可分为：同侧损伤（１９５）、对侧损伤（６３）和双侧损伤（５３）。根据病变形式可分为：单纯损伤（１４８）和伴或不伴骨折的复合损伤（１６３）。１３例假阴性损伤病例中，１１例是在伤后＜３小时作ＣＴ扫描的。结论：ＣＴ是诊断颅脑外伤的简便、有效、非侵入性诊断方法。熟悉颅脑损伤的病理过程，采取合理的ＣＴ检查与复查时机极为重要。
Objective: To evaluate and improve the sensitivity and accuracy of CT in the examination and diagnosis of craniocerebral trauma. MATERIALS AND METHODS: The clinical features, CT examination timing and CT findings of 311 patients with craniocerebral trauma were analyzed. Different types of craniocerebral trauma were explored to find out the appropriate timing of CT examination and review. Results: CT scan can easily show a variety of pathological changes of brain trauma: subdural and epidural hematoma, cerebral contusion, intracerebral hematoma, subarachnoid hemorrhage and exudate. According to the development of the disease can be divided into: immediate damage (242), delayed injury (56) and false negative injury (13). According to the lesion can be divided into: ipsilateral injury (195), contralateral injury (63) and bilateral injury (53). According to the lesion can be divided into: simple injury (148) and complex injury with or without fracture (163). Of the 13 cases of false negative lesions, 11 were CT scans at <3 hours post-injury. Conclusion: CT is a simple, effective and noninvasive diagnostic method for the diagnosis of traumatic brain injury. Familiar with the pathological process of brain injury, to take reasonable timing of CT examination and review is extremely important.