Black Belt Sign on Diluted-Contrast 3D Rotational Angiography as a Potential Neointimal Marker associated with Intracranial Aneurysm Occlusion after Flow Diversion

Shuhei Egashira; Yusuke Hamada; Satoru Kawauchi; Shogo Yoda; Yuta Otomo; Satoshi Miyamoto; Jun Isozaki; Daiichiro Ishigami; Wataro Tsuruta

doi:10.3174/ajnr.a9343

April 13, 2026American Journal of Neuroradiology

Black Belt Sign on Diluted-Contrast 3D Rotational Angiography as a Potential Neointimal Marker associated with Intracranial Aneurysm Occlusion after Flow Diversion

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Key Points

This research aims to evaluate the Black Belt Sign on diluted 3D rotational angiography as a biomarker for aneurysm occlusion after flow diversion.
Utilized diluted 3D rotational angiography (3DRA) to assess aneurysm occlusion status
Analyzed presence of Black Belt Sign (BBS) in relation to complete occlusion outcomes
Investigated association between White Clouding Sign (WCS) and neointimal formation after flow diversion treatment.
Black Belt Sign correlated with concurrent aneurysm occlusion status
BBS predicted complete occlusion in subsequent evaluations
WCS indicated signs of immature neointimal formation post-treatment.

Implication

Angiography predicts aneurysm occlusion in patients treated with flow diversion, suggesting new biomarker potential.

Abstract

Diluted 3DRA was identified as the optimal modality. BBS aligned with the concurrent aneurysm occlusion status and predicted subsequent complete occlusion, supporting its potential as a neointimal biomarker after FD treatment. WCS may reflect immature neointimal formation after FD.

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Cite This Study

Egashira et al. (2026) studied this question.

synapsesocial.com/papers/69e07c632f7e8953b7cbd9e4 https://doi.org/10.3174/ajnr.a9343

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Black Belt Sign on Diluted-Contrast 3D Rotational Angiography as a Potential Neointimal Marker associated with Intracranial Aneurysm Occlusion after Flow Diversion

Key Points

Implication

Abstract

Discussion

Cite This Study

Black Belt Sign on Diluted-Contrast 3D Rotational Angiography as a Potential Neointimal Marker associated with Intracranial Aneurysm Occlusion after Flow Diversion

Key Points

Implication

Abstract

Discussion

Cite This Study

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