64层螺旋CT低能量同步减影脑血管成像研究

目的:探讨64层螺旋CT低能量同步减影(CT low-energy synchronous digital subtraction angiography,CTLESDSA)脑血管成像方法及价值。方法:对拟诊脑血管疾病患者共89例,按能量随机分为A组(高能量)31例,B组(低能量)58例,全部行64层螺旋CT平扫、增强动脉期和静脉期扫描获得未减影数据,测量颈内动脉和颈内静脉密度。将动、静脉期数据减去平扫数据获得减影动脉期及减影混合动静脉期数据,静脉期数据减去动脉期数据获得减影静脉期数据。采用容积再现(VR)、薄层最大密度投影(TSMIP)重组动脉、混合动静脉及静脉图像。根据血管图像质量从好、一般到差分为Ⅰ、Ⅱ、Ⅲ级。结果:①A、B组动脉期或静脉期血管密度比较,B组动、静脉密度均较A组明显高(P0.05);组内比较,动脉期动脉较静脉密度明显高(P0.05),静脉期动、静脉密度均高且相似(P0.05);②A、B组间比较,B组血管图像质量较A组好,差异有统计学意义(P0.05)。减影图像与未减影图像相比去除了动脉、静脉相互的及颅骨的干扰,对脑血管解剖结构及病变显示清楚、直观。结论:64层螺旋CT同步减影脑血管成像是一种安全、可靠的技术,以低能量组脑血管密度更高,图像质量更好、更稳定,值得临床推广应用。

The study of cerebral vessels with 64-slice helical CT synchronous low-energy digital subtraction angiography

Objective:To investigate the method and value of 64-slice helical CT low-energy synchronous digital subtraction angiography.Methods:125 cases suspected cerebral vascular disease were randomly divided into high-energy and low-energy groups,31 cases in group A(high-energy),58 cases in group B(low energy).All cases were subjected to 64-slice spiral CT plain scan,enhanced arterial and venous phase scan to obtain data of non subtraction.The density of internal carotid artery and jugular vein density was rmeasnre...