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Follow-up non-contrast MRA after treatment of intracranial aneurysms using microcoils with prominent metallic artifact: a comparative study of TOF-MRA and Silent MRA

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Abstract

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.

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Authors and Affiliations

  1. Department of Radiology, Kurume University School of Medicine, Asahi-machi, 67, Kurume-shi, Fukuoka, 830-0011, Japan

    Shuichi Tanoue, Yusuke Uchiyama, Masamichi Koganemaru, Shuji Nagata, Norimitsu Tanaka & Toshi Abe

  2. Department of Neurosurgery, Kurume University School of Medicine, Asahi-machi, 67, Kurume-shi, Fukuoka, 830-0011, Japan

    Masaru Hirohata, Yasuharu Takeuchi & Kimihiko Orito

Authors
  1. Shuichi Tanoue
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  2. Yusuke Uchiyama
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  3. Masaru Hirohata
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  4. Yasuharu Takeuchi
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  5. Kimihiko Orito
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  6. Masamichi Koganemaru
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  7. Shuji Nagata
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  8. Norimitsu Tanaka
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  9. Toshi Abe
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Correspondence to Shuichi Tanoue.

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Tanoue, S., Uchiyama, Y., Hirohata, M. et al. Follow-up non-contrast MRA after treatment of intracranial aneurysms using microcoils with prominent metallic artifact: a comparative study of TOF-MRA and Silent MRA. Jpn J Radiol 38, 853–859 (2020). https://doi.org/10.1007/s11604-020-00981-x

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  • DOI: https://doi.org/10.1007/s11604-020-00981-x

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