三维CT血管造影在脑膜瘤诊断中的价值——与MRI对照观察

The Value of 3DCTA in the Diagnosis of Meningioma: Comparative Observation with MRI

应用三维ＣＴ血管造影（３Ｄ－ＣＴＡ）对４例脑膜瘤（上矢状窦旁、大脑镰、鞍结节、三叉神经半月节各１例）进行了检查，并与ＭＲＩ对照观察。结果显示：４例脑膜瘤在３Ｄ－ＣＴＡ图象上立体结构鲜明，与周围血管、骨结构立体解剖关系显示清楚；ＭＲＩ仅显示肿瘤的二维结构，需结合数字减影血管造影（ＤＳＡ）才能判定肿瘤相关血管的来源和走行。结论：３Ｄ－ＣＴＡ能清楚显示脑膜瘤的立体结构和与周围血管、骨结构的立体解剖关系，通过骨切削技术可模拟颅骨开瓣和手术入路。

Objective: This paper was to study the value of 3DCTA in the diagnosis of meningioma. Methods: We examined 4 cases of meningioma: 1 case located along superior sagittal sinus; 1 case in ceredral falx; 1 case in tubercle of sellae, and another one in trigeminal nerve semilunar ganglin. All were examined by 3DCTA and compared with MRI. Results: 3DCTA could display the three dimensional structure of the 4 meningiomas and demonstrated the stereoanatomic relationship with surrounding blood vessels and bone structure. MRI could display the 2Dstructure of the tumor only, and DSA was necessary for the judgement of the origin and course of its corelatived blood vessels. Conclusion: 3DCTA can display the threedimensional structure of meningioma and demonstrate the stereoanatomic relationship with surrounding blood vessels and bone structures clearly. We can simulate the cranioctomy with bone flap and surgical approach through the technique of serially erasing the bone images. 