MSCTA诊断脑动脉瘤多种重建方法的对照研究  

Study of different image reconstructiion techniques on the diagnosis of cerebral aneurysms of MSCTA

作　　者：宁殿秀[1] 李智勇[1] 刘静红[1] 张清[1] 苗延巍[1] 伍建林[1] 郎志谨[1] 杜敏安[2] 

机构地区：[1]大连医科大学附属第一医院放射科,辽宁大连116011 [2]大连医科大学附属第一医院介入科,辽宁大连116011

出　　处：《医学影像学杂志》2007年第9期902-905,共4页Journal of Medical Imaging

基　　金：辽宁省教育厅科学研究计划资助(项目编号:05L097)

摘　　要：目的:研究多层螺旋CT血管造影(MSCTA)不同重建方法对脑动脉瘤的诊断价值,进一步提高脑部MSCTA的诊断能力。方法:收集脑MSCTA检查的脑动脉瘤患者31例。采用GELight-speed及PHILIPSBrilliance16层螺旋CT机进行扫描,螺距:0.5～1.3,层厚:0.625～1.25mm。在GEadw4.2工作站上进行脑血管后处理重建,重建方法包括容积再现(VR)、最大密度投影(MIP)、表面遮盖显示(SSD)及曲面重建(CPR)。并对四种图像重建方法进行比较。结果:31例阳性病例中共有33个动脉瘤,VR与MIP显示32个,SSD显示30个,CPR显示29个。未显示动脉瘤直径均小于3mm。结论:VR与MIP显示脑动脉瘤最佳,是较常用的显示方法,而CPR与SSD存在一定的漏诊因素,有待于进一步研究。Objective：To study the different spiral CT angiographic image reconstruction techniques on the diagnosis of cerebral aneurysms, so as to improve the ability of examination and diagnosis in head CTA. Methods：31 cases, who were referred into our hospital conceming cerebral vascular diseases, were subjucted to GE Light Speed 16 slice and PHILIPS Brilliance 16 slice helical CT under the conditions of Pitch： 0.5- 1.3, slice thickness： 0.625- 1.25 nun. Reconstruction images were processed at GE adw4.2 workstation. VR,MIP, CPR and SSD were used as post-processing techniques of CT anglography. We compared the CTA diagnosis results with VR, MIP, CPR, and SSD.Results：Among thirty-one cases, 33 aneurysms appeared in fotal. The VR and MIP discovered 32 aneurysms, the SSD discovered 30 cases, and the CPR discovered 29 cases. Any aneurysm with a diameter less than 3 nun was not discovered. Conclusion：VR and MIP are the best of the three image post-processing techniques（VR,MIP, CPR and SSD） of CTA .But the CPR and SSD have certain disadvantages, which need to be researched further.

关 键 词：体层摄影术 X线计算机 脑血管造影 三维重建 

分 类 号：R739.41[医药卫生—肿瘤] R814.42[医药卫生—临床医学]