颅内动脉瘤的MSCTA诊断

Diagnosis of Intracranial Aneurysm with 64-slice CT Angiography

目的:探讨64层螺旋CT血管成像(64-MSCTA)对颅内动脉瘤的诊断价值。方法:搜集经DSA和手术证实的颅内动脉瘤18例,所有的病例均行64层螺旋CT血管成像。分别用最大密度投影(MIP)、容积再现(VR)、多平面重组(MPR)法进行图像重组。13例行手术治疗,5例行DSA检查。结果:18例患者中MSCTA发现动脉瘤17个,其中大脑中动脉7个,大脑前动脉6个,大脑后动脉2个,颈内动脉2个。1例左侧颈内动脉瘤MSCTA漏诊,经DSA检查发现。MSCTA上动脉瘤显示直径3～20mm。MSCTA所发现的17个动脉瘤与手术及DSA所见的动脉瘤位置、大小、形态基本一致。结论:MSCTA能清楚显示颅内动脉瘤的形态、位置及其与周围的解剖关系,为手术或介入治疗动脉瘤提供有价值的信息。

Objective：To evaluate the value of 64-slice CT angiography（MSCTA）in the diagnosis of intracranial aneurysm.Methods：18 patients with 18 intracranial aneurysms confirmed by DSA and surgery had MSCTA.The MSCTA data of these 18 patients were processed with maximum intensity projection（MIP）,volume rendering（VR）and multiplanar reconstruction（MPR）.DSA was performed in 5 cases and surgery was undertaken in 13 cases.Results：17 cerebral aneurysms were detected in these 18 patients by MSCTA,with aneurysm located at middle cerebral artery（n=7）,anterior cerebral artery（n=6）,posterior cerebral artery（n=2）and internal carotid artery（n=2）.1 aneurysm located in left internal carotid artery was found by DSA,yet was missed by MSCTA.The diameter of aneurysm ranged from 3～20mm on MSCTA images.The location,size and shape of these 17 cerebral aneurysms showed on MSCTA were in accordance with the result of DSA and/or surgery.Conclusion：MSCTA can display clearly the location,size and shape of intra-cranial aneurysm as well as their relationship with the adjacent anatomic structures,which provide valuable information for surgery or interventional therapy.