三维增强MR脑血管成像技术探讨

Study of the Technique of 3-Dimension Contrast Enhanced MR Angiography of Brain

目的探讨三维增强MR脑血管成像技术及其临床应用价值。方法行脑血管3D-CE-MRA检查46例,对其显示脑血管能力、病变的敏感性与真实性进行分析,并与3D-TOF-MRA比较。结果3D-CE-MRA显示全脑动脉及细小分支和静脉系统。本组动脉瘤15例(17个),3D-TOF-MRA显示13个,3D-CE-MRA全部显示。脑动脉狭窄17例,3D-TOF-MRA表现动脉中断和闭塞,3D-CE-MRA表现出动脉狭窄。动静脉畸形6例,3D-CE-MRA显示出供血动脉、畸形血管和引流静脉。脑肿瘤8例,3D-CE-MRA能显示肿瘤组织动态增强状态。结论3D-CE-MRA诊断脑血管病变敏感率、准确率高,具有临床应用价值。

Objective：To evaluate the technique and the clinical application of 3 dimension contrast enhanced MR angiography （3D-CE-MRA）. Methods： 3D-CE MRA was performed in 46 patients including cerebral aneurysms （n= 15 patients, 17 lesions）, cerebral artery strictu re （ n= 17 ）, arterio-venous malformation （ n = 6 ） and brain tumor （ n=8）. The capability of displaying blood vessels, sensitivity and accuracy of diagnosis were analyzed and compared with that of 3-D time of flight MR angiography （3D-TOF-MRA）. Results：Whole brain cerebral arteries as well as their small branches and cerebral vein system could be displayed on 3D-CE-MRA. Of the 17 cerebral aneurysms, all lesions were revealed on 3D-CE-MRA,however,only 13 lesions were detected by 3D-TOF-MRA. Of the 17 arterial strictures,discontinuation and obliteration of arteries were showed on 3D-TOF-MRA, yet arterial stricture was displayed on 3D-CE MRA. Of the 6 patients with arterio-venous malformation,the feeding artery,draining vein as well as the vascular malformation could be revealed on 3D- CE-MRA. 3D-CE-MRA showed the dynamic contrast enhancement of tumor tissue in the 8 cases having brain tumor. Conclusion：The sensitivity and accuracy of 3D-CE-MRA was satisfactory in the diagnosis and clinical practice of cerebral blood vessel abnormalities.