多层螺旋CT血管造影在主动脉夹层及主动脉瘤诊断中的价值

Applicable value of multislice CT angiography in diagnosing and treating aorta aneurysms and dissections

目的 :探讨多层螺旋CT血管造影在主动脉夹层及主动脉瘤中的临床应用价值。方法 :对 34例临床怀疑主动脉疾病者进行CT血管造影 ,层厚 3.2mm ,重建间隔 1.6mm ,pitch1.2 5 ,对比剂用量 10 0ml,注射速度 3ml/s,延迟时间 2 3～2 8s;对所有病人进行最大密度投影、多平面重组、表面遮盖显示、仿真内窥镜、容积再现重组。结果 :34例中 ,正常者 7例 ,主动脉夹层 16例 ,主动脉瘤 7例 ,左锁骨下动脉瘤 1例 ,马凡综合征 1例 ,主动脉弓血管置换术后 1例 ,腹主动脉瘤血管内支架术后 1例。结论 :MSCTA在主动脉夹层及主动脉瘤中有积极的临床应用价值 ,横断面CTA为诊断主动脉疾病的基础 ,图像后处理技术作为补充。

Objective:To explore the applicable value of multislice CT angiography (MSCTA) in diagnosing and treating aorta aeurysms and dissections.Methods:34 cases were performed MSCTA on a MX8000 scanner with slice thickness of 3.2mm, overlapping interval of 1.6mm, pitch 1.25. Scanning began at the time of 23s to 28s after the initiation of injection contrast media with the volume of 100ml and the rate of 3ml/s. Maxmium intensity projection, multiple reformation, shadowed surface display, virtual endoscopy and volume rendering were performed for all cases.Results:7 cases were normal, 16 cases aortic dissection, 7 cases aortic aneurysms, and 1 case left clavicle aneurysm, 1 case Marfan's syndrome, 1 case postoperation of dissection, 1 case follow-up of aortic intravascular stent among 34 cases.Conclusion:MSCTA has a positive applicable value in diagnosing and treating aortic aneurysms, axial images served as a basic method, which post-processing techniques as complementary for diagnosing aortic diseases.