64层螺旋CT脑血管造影在颅内动脉瘤诊断中的应用

目的:与DSA相对照,探讨64层螺旋CT脑血管造影在颅内动脉瘤中的诊断价值。方法:对29例临床怀疑颅内动脉瘤的患者行64层螺旋CT脑血管造影(CTA)和DSA检查,使用GE64层Lightspeed VCT获得原始图像,所有病例均采用多层面重建(multiplanar reconstruction,MPR)、容积再现(volume rendering,VR)、薄层块最大密度投影(thin-slab maximumintensity projectjon,TS MIP)。后处理图像及DSA图像由2位放射科医生共同评估。结果:29例患者中,DSA证实25例共27个动脉瘤,其中2例为2个动脉瘤。与DSA结果相对照,CTA共检出25例26个动脉瘤,漏诊了1个颈出动脉瘤。CTA清晰显示了动脉瘤的形态、大小及载瘤动脉,3例动脉瘤瘤颈DSA未显示,CTA显示了全部动脉瘤的瘤颈。结论:64层CTA在颅内动脉瘤的诊断中具有极高价值,特别在显示动脉瘤瘤颈方面具有独特的优势,对临床治疗具有指导意义。

Diagnotic application of intracranial aneurysm by 64-detector row CT angiography

Objective:To evaluate the diagnostic value of 64-detector row computed tomographic angiography(CTA) in intracranial aneurysm compared with the conventional intraarterial digital subtraction angiography(DSA).Methods:64-detector row CT angiography and DSA were performed in 29 patients with suspected intracranial aneurysms.Source images were got by GE light speed VCT scanner and were performed to reconstruct by MPR,VR,TS MIP.CTA reconstruction and DSA images were reviewed by 2 radiologists.Results:A total of 27 aneurysms were confirmed by DSA in 25 patients,in which two patients had two aneurysms.Compared with the results of DSA,26 cerebral aneurysms in 25 patients were found by CTA and I common carotid artery aneurysm was not diagnosed.The size, shape and parent vessel of aneurysm were clearly displayed by CTA.The neck of aneurysm in 3 cases was not displayed by DSA but was in all cases by CTA.Conclusion:64-detector row CTA has very high value in diagnosis,of intracranial aneurysms and has unique advantage in displaying the neck of aneurysm,providing precistic diagnose and treament information.