Introduction: 

Vertebrobasilar junction (VBJ) stenosis is a challenge in endovascular treatment due to structural variants and complexities. The role of high-resolution magnetic resonance imaging (HRMRI) in endovascular treatment for patients with severe VBJ stenosis is uncertain.

Case Report: 

Four patients with symptomatic VBJ stenosis underwent HRMRI of the vessel wall before endovascular treatment. In 3 patients, the VBJ could not be visualized on luminal imaging. One of them had a hypoplastic artery and 2 of them had severe stenotic arteries on HRMRI. HRMRI showed an artery with a negative remodeling in a patient with a hypoplastic vertebral artery. One patient had intraplaque hemorrhage and calcification, and 2 patients had calcification in VBJ lesions. Endovascular treatment was performed utilizing HRMRI findings to guide the decision-making process.

Conclusion: 

HRMRI provides additional information about the structure and angle of the VBJ, the characteristics and vulnerability of the plaques, and the lesion size, thus helping to improve the operation process and reduce the risk of complications.

中文翻译：

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高分辨率磁共振成像在椎基底动脉交界处狭窄血管内治疗中的应用

介绍： 

由于结构变异和复杂性，椎基底动脉交界处（VBJ）狭窄是血管内治疗中的一个挑战。高分辨率磁共振成像(HRMRI) 在严重 VBJ狭窄患者血管内治疗中的作用尚不确定。

案例报告： 

4 名有症状的 VBJ狭窄患者在血管内治疗前接受了血管壁 HRMRI 检查。3 名患者的 VBJ 在管腔成像中无法显现。HRMRI 显示其中 1 人动脉发育不全，2 人动脉严重狭窄。HRMRI 显示椎动脉发育不全患者的动脉出现负重塑。1例患者出现斑块内出血和钙化，2例患者出现VBJ病灶钙化。利用 HRMRI 结果来指导决策过程进行血管内治疗。

结论： 

HRMRI 可提供有关 VBJ 的结构和角度、斑块的特征和脆弱性以及病变大小的附加信息，从而有助于改进手术过程并降低并发症的风险。