摘要
目的 探讨不同方法磁共振血流成像 (MRA)对脑动静脉畸形 (CAVM)引流静脉的显示价值。资料与方法 35例CAVM患者均接受了 2DTOFMRA ,18例同时接受了 3DTOF、2DPC及 3DPCMRA ,10例还进行了 3DCEMRA和DSA的检查。以DSA为标准 ,采用双盲法对CAVM的引流静脉经不同方法MRA检查后的显示情况进行回顾性分析 ,重点分析深、浅静脉的显示率及合并存在的引流静脉狭窄和扩张。结果 2DTOF可以较满意地显示深浅引流静脉 ,与DSA相比较 ,其符合率为 90 % ,而对引流静脉的狭窄显示不清。 3DTOF对引流静脉的显示符合率为 5 0 % ,但可辨别静脉窦的血流方向。 2DPC、3DPC在Venc =30cm/s或Venc =6 0cm/s时 ,其对引流静脉的显示符合率分别为 87.5 %和 80 % ,PC法难以显示CAVMγ刀治疗后残存病灶的引流静脉。 3DCEMRA可满意显示引流静脉的全程 ,静脉窦的狭窄以及其合并存在的动静脉瘘 ,显示符合率为 10 0 %。结论 2DTOF和 3DCEMRA对CAVM引流静脉的显示有很高的符合率 ,应作为首选方法。
Objective To evaluate different MRA techniques in detecting the draining veins of cerebral arteriovenous malformations (CAVM). Materials and Methods With a 1.5T MR unit (Siemens Vision), 2D TOF MRA was performed in 35 patients with CAVM, of which additional 3D TOF, 2D PC and 3D PC MRA were carried out in 18, and additional 3D CE MRA and DSA in 10. Using DSA as control standard, the demonstrating rate of the draining veins of CAVM with different techniques was retrospectively analyzed, focusing on the detection of the deep and superficial veins, and of the stenosis or dilatation of the draining veins. Results 2D TOF MRA satisfactorily displayed both deep and superficial draining veins, with a coincident rate of 90% with DSA, although it could not well show the stenosis of the draining veins. 3D TOF had a coincident rate of 50% with DSA in detecting the draining veins, and could distinguish the flow direction in the venous sinus. With the velocity encoding at 30cm/s or 60cm/s, 2D PC MRA and 3D PC MRA had a coincident rate of 87.5% and 80%, respectively. PC technique could hardly demonstrate the draining veins within the residual lesions after γ knife treatment of CAVM. 3D CE MRA could display the whole course of the draining veins, the stenosis of the venous sinus and coexisted arteriovenous fistula, with a coincident rate of 100%.Conclusion 2D TOF and 3D CE MRA have high displaying rate of the draining veins of CAVM, it should be used as the first choice.
出处
《临床放射学杂志》
CSCD
北大核心
2002年第5期335-339,共5页
Journal of Clinical Radiology