螺旋CT增强扫描诊断主动脉夹层动脉瘤9例

Enhanced helical CT scanning for dissecting aneurysm of aorta

目的 探讨主动脉夹层动脉瘤的螺旋 CT扫描技术及临床价值 .方法 主动脉夹层患者 9例行螺旋 CT增强扫描 ,原始图像在工作站进行 MPR或三维图像重建 (SSD) .结果 横轴位图像上可观察到真假腔及内膜片、破口位置及主动脉壁钙化 .MRP及三维重建图像能观察主动脉弓受累情况 ,确定内膜剥离范围 ,显示内膜与血管之间的关系 .按 Stanford分类法 ,A型 4例 ,B型 2例 ,3例未明确类型 .结论 螺旋 CT是诊断主动脉夹层较好的影像方法 .选择合适的扫描参数及图像后处理技术是保证影像质量。

AIM To investigate enhanced helical CT scanning of dissecting aneurysm of aorta and its clinical value. METHODS Enhanced helical CT scanning was performed on 9 patients with dissecting aneurysm of aorta. Their original images underwent multiplanar reformation (MPR), or reconstructed by surface shadow display (SSD). RESULTS On the horizontal axial image,the true and false channels, intimal flap, the location of the rupture and aortic mural calcification could be observed. By MPR and 3-dimensional reconstructed images, aortic arch involvement could be observed, the extent of intimal tear could be identified and the relation between the intima and vessels concerned could be demonstrated. By the Stanford classification, 4 cases were designated as having type A; 2 were type B, and the rest 3 could not be confirmed. CONCLUSION Helical CT scanning is an ideal imaging method for the diagnosis of aortic dissections. It is important to select appropriate scanning parameters and post-imaging techniques to ensure the acquisition of high quality images and accurate diagnostic information.