Evaluation of luminal and vessel wall abnormalities in subacute and other stages of intracranial vertebrobasilar artery dissections using the volume isotropic turbo-spin-echo acquisition (VISTA) sequence: A preliminary study
Evaluation of luminal and vessel wall abnormalities in subacute and other stages of intracranial vertebrobasilar artery dissections using the volume isotropic turbo-spin-echo acquisition (VISTA) sequence: A preliminary study
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DOI：
10.1016/j.neurad.2012.02.005
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发表时间：
2013-03-01
影响因子：
3.5
通讯作者：
Shibamoto, Yuta
中科院分区：
文献类型：
--
作者：
Sakurai, Keita;Miura, Toshiyasu;Shibamoto, Yuta
目的：探讨三维可变重聚焦翻转角体积各向同性快速自旋回波成像(Vista)在诊断椎基底动脉夹层(VAD)中的应用价值。方法：对18例VAD患者的20条(亚急性期15条，其他期5条)Vista图像进行T1W加权成像，评价Vista图像中内膜瓣、壁内血肿、血管扩张及异常血管强化的情况。对13名患者提供了额外的Gd增强T1 Vista图像。并对VAD患者和对照组70支未夹层动脉T1VISTA图像上血流伪影的发生率进行了评估。此外，对13例和8例患者分别采用稳态破坏梯度回忆法(SPGR)增强三维(CE3D)成像和心电门控黑血(BB)T1加权成像(T1WI)对假腔的显示进行比较。结果：在T1Vista图像上，65%(13/20)、55%(11/20)和90%(18/20)Vista图像可显示内膜瓣、壁内血肿和扩张。在增强T1VISTA图像上，100%(15/15)的VADs可见异常血管强化。只有4条正常动脉显示细小、细小的线状伪影。与CE3D-SPGR相比，T1VISTA对7例VAD显示假腔更明显(P=0.02)。T1VISTA。同时显示内膜瓣和血肿。结论：T1VISTA能显示血管壁和管腔的异常，血流伪影最少，对亚急性期VAD的诊断有一定价值。(C)2012年爱思唯尔·马森公司。版权所有。
Objective: To evaluate the utility of 3D variable refocusing flip-angle volume isotropic turbo-spin-echo acquisition (VISTA) imaging, using a 1.5-T MRI unit, which can minimize flow artifacts, due to its sequence-endogenous flow-void capability, in the diagnosis of intracranial verte-brobasilar artery dissection (VAD).Material and methods: The presence of intimal flaps, intramural hematomas, vessel dilatations and abnormal vessel enhancements were evaluated on T1-weighted VISTA images from 18 VAD patients with 20 dissected arteries (15 subacute and five at other stages). Additional gadolinium-enhanced T1 VISTA images were available for 13 patients. The frequency of flow artifacts on T1VISTA imaging in 70 non-dissected arteries in VAD patients and 12 control subjects was also evaluated. Furthermore, in 13 and eight patients, contrast-enhanced three-dimensional (CE3D) imaging with spoiled gradient-recalled (SPGR) acquisition in steady state and electrocardio-graphically gated black-blood (BB) T1-weighted imaging (T1WI) were evaluated to compare visualization of false lumens.Results: Intimal flaps, intramural hematonnas and dilatations were identified on T1 VISTA images in 65% (13/20), 55% (11/20) and 90% (18/20) of VADs, respectively. Abnormal vessel enhancement was recognized in 100% (15/15) of VADs on contrast-enhanced T1VISTA images. Only four normal arteries showed small, thin, linear artifacts. Compared with CE3D-SPGR imaging,T1VISTA imaging depicted false lumens more conspicuously in seven VADs (P=0.02). T1VISTA. also revealed intimal flaps and hematomas as did BB T1WI.Conclusion: T1VISTA imaging may be useful for diagnosing VAD at subacute stages, as it can reveal vessel wall and lumen abnormalities with a minimum of flow artifacts. (C) 2012 Elsevier Masson SAS. All rights reserved.