64层螺旋CT脑动脉造影方法研究

目的:探讨应用64层螺旋CT进行脑动脉造影(CTA)检查扫描的最佳时相和方法,优化图像后处理,为脑动脉畸形及脑动脉瘤等脑血管病变提供可靠的依据。方法:使用西门子公司Sensation 64层螺旋CT及后处理工作站,应用相应的4D后处理软件及血管对比剂自动跟踪触发扫描软件(BOLUS软件)。选取临床诊断蛛网膜下腔出血及怀疑脑血管畸形的患者38例,采用Bolus跟踪与目测颈动脉对比剂浓度相结合的方法进行脑动脉CT造影检查。结果:38例患者中达到诊断标准34例,扫描失败3例,经延迟补救扫描后成功1例,其中6例行DSA造影,5例符合,1例行DSA造影时未发现动脉瘤,再行CTA检查确切检出动脉瘤。符合率83.3%。结论:使用64层螺旋CT,采用BOLUS跟踪与目测颈动脉对比剂浓度相结合的方法进行脑动脉CT造影检查可准确区分脑动-静脉血管,在诊断脑血管疾病方面可以作为常规方法使用。

A study of cerebrovascular disease by 64-slice spiral CTA

Objective:To study the best phase and method in cerebral arterial angiography(CTA) of cerebrovascular disease by 64-slice spiral CT and optimize imaging by post-processing,in order to providing the credible basis in CTA of cerebrovascular diseases.Methods:CTA with Sensation 64-slice spiral CT was performed in 38 cases suspected with subarachnoid hemorrhage and AVM.Combination of bolus track method and contrast-concentration of cervical artery in supervision by eyes was used for CTA.The source imagings were processed with 4D-post-processing software and auto-track spring software(Bolus software) in post-processing station.Results:Thirty-four patients is positive according to the diagnosis critera and 3 cases negative,1 case is positive after delay-compensate scanning.Six cases with DSA were done,5 of them is positive and 1 case with aneurysm is not positive in DSA but positive with CTA later.Positive rate in CTA is 83.3% in our group.Conclusion:CTA performed by combination of bolus track method and contrast-concentration of cervical artery in supervision by eyes could accurately demonstrate cerebrovascular imagings,which should be the routine method in examination of cerebrovascular diseases.