摘要
目的探讨多排螺旋CT及多平面重建技术在主动脉夹层动脉瘤的诊断和治疗中的应用价值。方法对36例主动脉夹层患者进行多层螺旋CT平扫加增强扫描,并利用原始数据在AW4.2工作站进行多平面重建。结果横轴位图像上可观察到真假腔形态、大小,真腔显影早于假腔,假腔直径均大于真腔,真腔受压呈新月形。结合多平面重建图像显示破口位于左锁骨下动脉远端30例(83.3%),显示钙化的剥离内膜片19例(52.7%)。多平面重建图像能观察主动脉弓受累情况,确定内膜剥离范围,显示内膜与各分支血管之间的关系。28例(77.7%)腹腔干动脉及肠系膜上动脉受累,6例(16.6%)髂总动脉受累。按DeBakey分型,表现为Ⅰ型4例,Ⅱ型2例,Ⅲ型30例。结论多排螺旋CT扫描及多平面重建能对夹层动脉瘤明确分型,对主动脉夹层的诊断有较高的临床应用价值。
Objective To probe role of multi-slice CT（MSCT） and multi-planar reconstruction（MPR） in diagnosing dissecting aneurysm of aorta （ADA）. Methods 36 cases with ADA underwent plain and contrast-enhanced scan with MSCT, all raw data were processed for MPR in AW4.2 workstation. Results On axial images, anatomy and size of true and false cavities were displayed, with the former preceding the latter in time and smaller than the latter in size, and the former was crescent-like due to compression. Combined with MPR,30 cases（83.3%）showed rupture located distal end of left subclavian artery, and 19 （52.7%） showed calcificated and dissected intima flap. MPR was able to display involvement of aortic arch, size of dissected intima flap, and relation between intima and supplying blood vessels. 28（77.7%） involved celiac trunk and superior mesenteric artery and 6 （16.6%） involved common iliac artery. According to De Bakey＇s classification, 4 cases were type Ⅰ ; 2 were type Ⅱ ; 30 were type Ⅲ. Conclusion MSCT and MPR are able to classify ADA, playing a useful role in diagnosing ADA.
出处
《中国CT和MRI杂志》
2006年第1期20-22,共3页
Chinese Journal of CT and MRI
作者简介
通讯作者：（250014）山东省千佛山医院影像科 李群
