History:A67-year-oldmanpresentswithsudden-onsethemiplegiaandisbroughttotheemergencyroomwithin30minutesofonset.Patienthasahistoryofatrialfibrillation.

病史：67岁男性，突发偏瘫，30分钟内被送至急诊室，患者有房颤病史。

UnenhancedCTimagesandCTangiography(CTA)ofthebrainareshownbelow.

颅脑CT平扫及CTA如下所示。

Conventionalangiographywasperformed.Digitalsubtractionangiography(DSA)imagesareshownbelow.

行血管造影，DSA图像如下所示。

Thombectomywasperformed.

行血栓切除术。

Findings表现

UnenhancedheadCT:CTdemonstratespoorgray-whitedifferentiationintherightbasalgangliaandinsularcortex.ThereisalsofocalhighdensityintheM1branchoftherightMCA,whichmayrepresentacutethrombus.

颅脑CT平扫：右侧基底节及岛叶皮层灰白质分界模糊，右侧大脑中动脉M1段呈局限性高密度，可能代表急性血栓形成。

HeadCTA:CTAdemonstratesafillingdefectattheproximalM1branchoftherightMCAwithpoorvisualizationofthedistalvasculature.

颅脑CTA：右侧大脑中动脉M1段近段见充盈缺损，其远端血管分支显示较差。

CerebralDSAandmechanicalthrombectomy:ThereisafillingdefectattheproximalM1branchoftherightMCAwithoutdistalperfusion.Followingmechanicalthrombectomywithastentretriever(stentriever)device,thereis







































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