颅内微小动脉瘤256层3D-CTA与3D-DSA的对照研究

The comparative study on 256 slice 3D-CTA and 3D-DSA for intracranial Micro-aneurysms

目的:探讨256层3D CT血管成像(3D-CTA)对颅内微小动脉瘤(IMA)的诊断价值。方法:回顾性研究3D-CTA及3D-DSA诊断的38例(40个)颅内微小动脉瘤,以3D-DSA为标准,比较两种检查对动脉瘤数目、位置、大小、形态、瘤颈、子瘤显示的差异。结果:3D-CTA显示38个微小动脉瘤,漏诊2例2个,2例3D-CTA显示单个动脉瘤,3D-DSA证实为2个动脉瘤。3D-CTA显示2例假阳性。颈内动脉7个,基底动脉环18个,大脑前动脉8个,大脑中动脉7个。CTA与DSA两者均能清楚显示IMA特征性征象情况。结论:256层3D-CTA对颅内微小动脉瘤显示清晰,与3D-DSA检出无明显差异。256层3D-CTA可以作为诊断颅内微小动脉瘤的首选影像学方法。

Objective：To investigate the difference of 256 slice 3- dimension computed tomography angiography（3D-CTA） and 3- dimension digital subtraction angiography（ 3D- DSA） in diagnosis of intracranial micro- aneurysms（ IMA）.Methods：To retrospectively research 38 patients（40 ovarian） with IMA,all patients were examined in both 3D- CTA and 3D- DSA. With 3D- DSA as standard,The informations of IMA about number,location,size,shape,aneurysm neck,children aneurysms were compared between two examined. Results：Thirty- eight ovarian with IMA were found by 3D- CTA,false- negative findings by 3D- CTA in 2 patient was identified having 2 IMA by 3D- DSA,while only one IMA showed by 3D- CTA.False positive sign of IMA was showed by 3D- CTA in 2 case. The location of IMA was in the internal carotid artery in 7,in the Cerebral arterial circle in 18,in the anterior cerebral artery in 8,in the middle cerebral artery in 7. The characteristic manifestations of IMA can dispay by 3D- CTA between 3D- DSA. Conclusion：3D- CTA can dispay IMA clearly,and was no significant difference in accuracy of detected about IMA by 3D- DSA. we suggest that 3D- CTA may be the first choice for diagnosis of IMA.