Purpose

Some of the detachable microcoils are associated with the prominent metallic artifact. We have applied Silent MRA to reduce the artifact. In this study, we present a retrospective study in which Silent MRA is used for cases showing prominent metallic artifact on conventional TOF-MRA due to a detachable bare platinum microcoil (Barricade coil).

Materials and methods

Fifteen patients, who had undergone endosaccular embolization using Barricade coil and other detachable microcoils up to 3 days previously, were scanned with TOF-MRA and silent MRA at the same time. The treatment DSA and follow-up MRA images were graded by two experienced neuroradiologists, focusing on the visibility of residual aneurysm and parent arterial lumen.

Results

DSA images showed residual aneurysm (RA) in four, residual neck (RN) in six, and complete occlusion (CO) in five patients. TOF-MRA images showed RN in five, CO in four, mild defect (MD) in one, severe defect (SD) in three, and complete defect in two. In contrast, on Silent MRA, the grades were RA in two, RN in five, CO in five, and MD in three.

Conclusion

Barricade coils are associated with prominent metallic artifact on TOF-MRA. Silent MRA is useful for follow-up MRA after embolization using Barricade coils.

Secondary abstract

The metallic artifacts were compared between TOF-MRA and Silent MRA in patients treated by using Barricade coils. Barricade coils are associated with more metallic artifact on TOF-MRA than Silent MRA. Silent MRA is useful for follow-up MRA after embolization using Barricade coils.

中文翻译：

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使用具有突出金属伪影的微线圈治疗颅内动脉瘤后的随访非对比 MRA：TOF-MRA 和 Silent MRA 的比较研究。

目的

一些可拆卸的微线圈与突出的金属制品有关。我们已应用 Silent MRA 来减少伪影。在这项研究中，我们提出了一项回顾性研究，其中 Silent MRA 用于在传统 TOF-MRA 上由于可拆卸的裸铂微线圈（Barricade 线圈）而出现明显金属伪影的情况。

材料和方法

15 名在 3 天前使用 Barricade 线圈和其他可拆卸微线圈接受过囊内栓塞的患者同时接受了 TOF-MRA 和无声 MRA 扫描。治疗 DSA 和后续 MRA 图像由两位经验丰富的神经放射科医生分级，重点关注残留动脉瘤和母动脉腔的可见性。

结果

DSA 图像显示 4 例残余动脉瘤 (RA)，6 例残余动脉瘤 (RN)，5 例患者完全闭塞 (CO)。TOF-MRA 图像显示 RN 5 个，CO 4 个，轻度缺陷 (MD) 1 个，严重缺陷 (SD) 3 个，完全缺陷 2 个。相比之下，在 Silent MRA 上，等级为 RA 2 级、RN 5 级、CO 5 级和 MD 3 级。

结论

路障线圈与 TOF-MRA 上突出的金属伪影有关。无声 MRA 可用于使用 Barricade 线圈栓塞后的后续 MRA。

二级摘要

在使用 Barricade 线圈治疗的患者中，比较了 TOF-MRA 和 Silent MRA 之间的金属伪影。与 Silent MRA 相比，路障线圈在 TOF-MRA 上与更多的金属伪影相关。无声 MRA 可用于使用 Barricade 线圈栓塞后的后续 MRA。