CT血管造影与彩色多普勒超声对主动脉夹层的诊断价值

目的：探讨CT血管造影与彩色多普勒超声对主动脉夹层的诊断价值。方法选择本院2009年6月～2013年5月收治的经手术证实的主动脉夹层患者40例，全部患者术前均行多层螺旋CT血管造影检查、经胸部超声检查，其中CT扫描数据在后处理工作站行多平面重建、容积重建等，比较两种方法对主动脉夹层的诊断价值。结果 CT血管造影对主动脉夹层的检出率、分型准确率明显高于经胸部超声检查，两者差异有统计学意义。全部患者CT血管造影均清晰显示主动脉夹层的真假腔、内膜片及破裂口部位，其中主动脉夹层分型为Ⅰ型14例，Ⅱ型4例，Ⅲ型22例。结论多层螺旋CT血管造影通过强大的后处理技术可以快速准确地诊断主动脉夹层，并明确分型，其诊断准确性明显高于超声检查，可以作为临床主动脉夹层筛查的首选方法。

Diagnostic value of CT angiography and color Doppler ultrasound for aortic dissection

Objective To investigate the diagnostic value of CT angiography and color Doppler ultrasound for aortic dissection. Methods 40 patients with aortic dissection confirmed by surgery in our hospital from June 2010 to May 2013 were selected,all patients were given preoperative multislice spiral CT angiography and transthoracic echocardiography,CT scan data was given multi-planar reconstruction,volume reconstruction in the processing workstation,diagnostic value of two methods were compared. Results The detection rate, classification accuracy of CT angiography was significantly higher than by transthoracic echocardiography, the difference was statistically significant.CT angiography in all patients clearly show true and false lumen of aortic dissection,rupture of the intimal flap and mouth parts,classification of aortic dissection was typeⅠin 14 cases,typeⅡin 4 cases,typeⅢin 22 cases. Conclusion By means of powerful post-processing techniques,Spiral CT angiography can quickly and accurately diagnose aortic dissection,and explicitly typing, its diagnostic accuracy is significantly higher than ultrasound,may be clinically preferred method of screening for aortic dissection .