Department of Radiology, Konkuk University School of Medicine, Seoul 143-729, Korea.
Korean J Radiol. 2011 Nov-Dec;12(6):662-70. doi: 10.3348/kjr.2011.12.6.662. Epub 2011 Sep 27.
To evaluate the usefulness of time-resolved contrast enhanced magnetic resonance angiography (4D MRA) after stent-assisted coil embolization by comparing it with time of flight (TOF)-MRA.
TOF-MRA and 4D MRA were obtained by 3T MRI in 26 patients treated with stent-assisted coil embolization (Enterprise:Neuroform = 7:19). The qualities of the MRA were rated on a graded scale of 0 to 4. We classified completeness of endovascular treatment into three categories. The degree of quality of visualization of the stented artery was compared between TOF and 4D MRA by the Wilcoxon signed rank test. We used the Mann-Whitney U test for comparing the quality of the visualization of the stented artery according to the stent type in each MRA method.
The quality in terms of the visualization of the stented arteries in 4D MRA was significantly superior to that in 3D TOF-MRA, regardless of type of the stent (p < 0.001). The quality of the arteries which were stented with Neuroform was superior to that of the arteries stented with Enterprise in 3D TOF (p < 0.001) and 4D MRA (p = 0.008), respectively.
4D MRA provides a higher quality view of the stented parent arteries when compared with TOF.
通过与时间飞越（TOF）-MRA 对比，评估支架辅助线圈栓塞后时间分辨对比增强磁共振血管造影（4D MRA）的实用性。
在 26 名接受支架辅助线圈栓塞治疗的患者（Enterprise：Neuroform=7：19）中，通过 3T MRI 获得 TOF-MRA 和 4D MRA。MRA 的质量按 0 到 4 的分级量表进行评分。我们将血管内治疗的完全性分为三类。通过 Wilcoxon 符号秩检验比较 TOF 和 4D MRA 对支架动脉可视化质量的影响。我们使用 Mann-Whitney U 检验比较两种 MRA 方法中根据支架类型对支架动脉可视化质量的影响。
无论支架类型如何，4D MRA 对支架动脉的可视化质量均明显优于 3D TOF-MRA（p<0.001）。Neuroform 支架的血管质量优于 Enterprise 支架的血管质量，在 3D TOF（p<0.001）和 4D MRA（p=0.008）中均如此。
与 TOF 相比，4D MRA 可提供支架母动脉更高质量的图像。
