3DTOFMRA分段采集技术在脑血管病变诊断中的应用价值  

3D TOF MRA with partition data gathering technique in the diagnosis of cerebral vascular diseases

作　　者：宁殿秀[1] 王秀凤[1] 孙博[1] 孙美玉[1] 董越[1] 王绍武[1] 刘爱连[1] 郎志谨[1] 宁頔[2] 刘官馥[3] 纪晓晨[3] 

机构地区：[1]大连医科大学附属第一医院放射科,辽宁大连116011 [2]南京大学数学系 [3]大连医科大学医学影像系

出　　处：《实用放射学杂志》2012年第10期1619-1622,共4页Journal of Practical Radiology

基　　金：基金项目：辽宁省教育厅科学研究计划资助项目（05L097）.

摘　　要：目的探讨3DTOFMRA分段采集技术在脑血管性病变诊断中的应用价值。方法收集在本院行磁共振3DTOFMRA分段采集技术的脑血管性疾病100例，使用GE1．5THDxt磁共振机，扫描参数：FOV20cm，层厚1．2mm，扫描范围3～4块，每块32层，重叠部分8mm，TR：minmLlm，TE：outofphase，反转角20。，图像参数选择主要包括磁转换（magnetizationtransfer，MT）。图像后处理使用GE4．4工作站进行血管三维重组。结果100例患者中，发现颅内动脉瘤26例，脑动静脉畸形、动脉瘤术后复查、烟雾病各5例，脑血管狭窄21例，38例脑血管未见异常。部分病例与其他影像学对比研究，诊断符合率为100％。3DTOFMRA可以立体、直观地显示脑血管的空间解剖细节，可充分观察到脑动脉瘤的准确起源、瘤体大小、颈部宽窄及血管走向等情况，本组病例中所显示的最小动脉瘤直径约2．6mm，最大直径为28．9mm；同时，3DTOFMRA也可作为脑动脉瘤术后评价的一种无创性检查方法，观察术后电解可脱弹簧圈所在的位置和远端血管通畅情况等。三维图像对于脑动静脉畸形和烟雾病有良好显示效果。三维成像中，容积再现图像最佳。结论分段采集3DTOFMRA技术是在普通MRA基础上的改进，图像质量及诊断率较高，是一种无创性脑血管成像方法，在脑血管性疾病的诊断和术前术后评价中发挥着重要作用。Objective To evaluate the value of 3D TOF MRA with partition data gathering technique in the diagnosis of cerebral vascular diseases. Materials and Methods 100 patients with cerebral vascular diseases were examined with 3D TOF MRA （GE 1.5T HDxt; FOV： 20 cm, slice thickness： 1.2 ram, 3--4 sections, 32 slices each seetion,overlop locs：8 mm,TR： minmum, TE：out of phase, flip angle：20 degrees, magnetization transfer）. Data were processed using GE ADW4.4 workstation. Results Of the 100 patients, intracranial aneurysms were found in 26, arteriovenous malformation in 5, Moyamoya disease in 5 and cerebral vascular stenosis in 21, and 5 were for post-operative aneurysm review and 38 were normal. Images were compared with those aquired with other imaging modalities. The diagnosis coincidence rate was 100%. 3D TOF MRA could clearly display spacial anatomic details such as the origin, size,, neck width, and route of cerebral aneurysm. The smallest diameter was 2.6 mm, and the largest 28. 9 ram. 3D TOF MRA could also perform post-operative evaluations of cerebral aneurysm as an non-invasive examination method, being able to observe the locatin of electrolytically detachable coils and the patency of distal vessels. Besides, 3D TOF MRA could be used to diagnose arteriovenous malformation, cavernous hemangioma and Moyamoya disease. Volume rendering （VR） was the best in the three-dimensional images. Conclusion As a non-invasive examination, 3D TOF MRA can play an important role in the diagno- sis and pre- and post-operative evaluation of cerebral vascular diseases.

关 键 词：脑血管 磁共振成像 血管造影 磁共振血管成像 

分 类 号：R743[医药卫生—神经病学与精神病学] R445.2[医药卫生—临床医学]