多排螺旋 CT 血管造影及后处理技术在急性主动脉综合征诊断中的应用

Diagnostic value of multi-slice spiral CTA and image-post processing techniques in acute aortic syndrome

目的：探讨多排螺旋CT血管造影（MSCTA）及后处理技术在急性主动脉综合征（AAS）的临床应用价值。方法采用东芝Aquilion64层螺旋CT扫描机，对71例AAS患者行MSCTA检查，以轴位CT为主，结合二维及三维重组技术进行图像综合分析。结果71例AAS患者，主动脉夹层（ AD）48例，主动脉壁内血肿（IMH）10例，穿透性粥样硬化性溃疡（PAU）13例。 MSCT能够显示3种疾病的特征性征象：AD可见内膜片和双腔征；IMH见主动脉壁呈新月形或环形增厚≥5 mm，平扫呈高密度，增强扫描后无强化；PAU表现为内膜下溃疡，内见对比剂充盈，部分可呈“狭颈征”表现。在多平面重建、曲面重建中71例均清晰显示病变部位、累及范围及并发症。其中27例确诊后行介入或外科手术治疗及复查。结论 MSCT是一种快速、准确、无创的检查方法，能为AAS的诊断及制定治疗方案提供重要信息，有助于临床制定正确的治疗方案。

Objective To investigate the clinical value of multi-slice spiral CTA （ MSCTA ） and image-post processing techniques in diagnosis of acute aortic syndrome （ AAS） .Methods 71 patients with AAS were scanned by TOSHIBA Aquilion 64-slice spiral CT,the images on axial and 2D/3D were analyzed.Results 71 cases included 48 cases of aortic dissection （ AD） ,10 cases of intramural hematoma （ IMH） and 13 cases of penetrating atheroscle-rotic ulcer （ PAU） .MSCT depicted the imaging features of AAS：AD showed intimal flap and true and false lumens;IMH showed crescent or circular thickening of aortic wall .PAU showed a niche filling with contrast medium and pro-truding the aortic lumen ,where ＂narrow neck sign＂was shown .The location ,radiological diagnosis and complications of AAS were observed in 71 patients.Intervention treatment or surgical treatment was conducted in 27 cases after defi-nite diagnosis .Conclusion MSCT is a fast and noninvasive examination technique , and it can provide important information for the diagnosis and treatment of AAS .