Diagnostic Value and Clinical Application of Multi-slice Spiral CT Angiography in Aortic Dissection

Objective To evaluate the diagnostic value and clinical application of multi-slice spiral CT angiography(CTA) in aortic dissection.Methods The clinical data of 35 patients with aortic dissection having undergone multi-slice spiral CT angiography were studied retrospectively.The volume data were transferred to the workstation for image post processing by performing multiplanar reconstruction(MPR),volume rendering(VR) and maximum intensity projection(MIP).All images were diagnosed by two experienced associate chief physicians of radiology.Results The true lumens,false lumens,the dissection membranes and tear crevices were showed definitely in all the 35 cases.Twelve cases were typeⅠ,3 were type Ⅱ,20 were type Ⅲ.Among them,the lesion involved left subclavian artery in 5 patients,left common carotid artery and innominate artery in 2,celiac trunk in 3,superior mesenteric artery in 4,left renal artery in 3,right renal artery in 2,right common iliac artery in 6,left common iliac artery in 8,bilateral common iliac artery in 4,combined aneurysm in 3,and intramural hematoma in 4.Single or multiple crevasses were showed in all cases.Conclusion Multislice spiral CT angiography and comprehensive post-processing techniques can diagnose aortic dissection quickly,and can provide significant information for clinical therapeutic schedule.