64排CT对主动脉夹层的诊断价值

目的：探讨主动脉夹层在64排CT CTA下的表现及64排CT CTA 对该病的临床诊断价值和优势。方法：回顾性分析85例经临床证实的主动脉夹层CTA表现及其与DSA的比较。结果：85例患者中阳性58例，阴性27例。与DSA比较造影剂用量明显减少，肾毒性减小；检查时间缩短，患者接受辐射量减少；显示病变范围扩大等。结论：多排螺旋CTA具有几种技术特点，最大密度投影（MIP），表面遮盖显示（SSD），多平面重组（MPR），容积再现（VR）等，成像后可以清晰地显示主动脉全程血管的形态走向。区分动脉管壁的硬化性钙斑及管腔内造影剂，从各方位、多角度直观观察评判受检血管，对临床医生治疗具有重要的指导价值。

64-slice CT for the diagnosis of aortic dissection

Objective： To study aortic dissection in 64-slice CT CTA＇s performance and 64-slice CT CTA in diagnosis of the disease and benefits. Methods： A retrospective analysis of 85 cases confirmed by clinical manifestations of aortic dissection CTA and DSA comparison. Results： Of 85 cases, 58 cases of patients with positive and negative in 27 cases. Compared with DSA significantly reduced amount of contrast agent, renal toxicity decreases; check the time, patients received radiation reduced; enlargement of the tumors. Conclusion： The multi-slice CTA has several technical features, Maximum intensity projection （MIP）, shaded surface display （SSD）, multiplanar reformation （MPR）, volume （VR）, and so on. Imaging can clearly show the entire aortic blood vessels. Distinction between arteries and hardening of calcium plaque in the lumen of contrast agent, from every position, multi-angle visual observation of vascular evaluation subjects, medical treatment has important clinical guidance value.