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目的探讨64层螺旋CT血管成像(CTA)及其后处理技术对诊断主动脉夹层(AD)的价值及优势。方法对临床高度疑似后经手术证实为主动脉夹层的32名患者进行64层螺旋CT的CTA扫描,并对扫描的原始数据进行容积重建(VR)、多平面重建(MPR)、最大密度投影(M IP)等后处理。结果 32例患者均能清晰显示主动脉夹层的开口、范围、内膜瓣的情况、真假腔的大小、假腔内血栓及主动脉主要分支(头臂干、左颈总动脉、左锁骨下动脉、腹腔干、肠系膜上下动脉、肾动脉及髂动脉等)的受累情况,并能显示相应器官的供血情况。结论 64层螺旋CT血管成像技术可以无创、清晰、迅速地显示主动脉夹层及其主要分支以及相应器官的供血情况,为临床诊断及治疗提供强有力的依据,是诊断主动脉夹层的首选检查方法,尤其适用于急诊主动脉夹层的患者。
Objective To investigate the value and advantages of 64-slice spiral CT angiography (CTA) and its post-processing techniques in diagnosis of aortic dissection (AD). Methods CTA scan of 64 spiral CT was performed on 32 patients with clinically suspected high degree of aortic dissection. The primary data of the scan were volume reconstruction (VR), multiplanar reconstruction (MPR), maximum density projection M IP) and other post-processing. Results Thirty-two patients were able to clearly show the aortic dissection opening, extent, intimal flap, the size of true and false lumen, fake intracavitary thrombosis and major aorta branches (brachiocephalic trunk, left common carotid artery, left subclavian Arterial, celiac, superior mesenteric artery, renal artery and iliac artery, etc.), and can show the corresponding organs of the blood supply. Conclusion 64-slice spiral CT angiography can noninvasively, clearly and rapidly display the blood supply of aortic dissection, its major branches and corresponding organs, provide a strong basis for clinical diagnosis and treatment, and is the first choice for the diagnosis of aortic dissection , Especially for emergency patients with aortic dissection.