【作者】 项劲驰；

【导师】 罗天友；

【作者基本信息】 重庆医科大学 ， 影像医学与核医学， 2006， 硕士

【摘要】 目的:研究64排螺旋CT(GE LightSpeed VCT,简称VCT或容积CT)肝脏血管成像(computed tomography angiography, CTA)的最佳扫描时间。材料与方法:随机选取2005年10月至2006年2月因各种原因行上腹部VCT平扫及增强扫描检查的病例155例(男96例,女59例,年龄13～88岁,平均55.59岁)作为本课题研究对象。全部病例均先行腹部平扫,然后从肘正中静脉注入对比剂,在智能追踪技术(Smart Prep)对腹主动脉追踪下行肝动脉期(hepatic arterial phase, HAP)、门静脉期(portal venous phase, PVP)及肝静脉期(hepatic venous phase, HVP)扫描,并对其中25例腹主动脉和39例门静脉在增强扫描前分别进行了吸气并屏气状态下的小剂量同层动态测试法(Test Bolus)扫描试验。数据统计指标包括时间、CT值(或称密度)及血管分支级别等。应用VCT主机工作站与GE Advantage Windows 4.2工作站相互协同完成图像和数据的处理。将所有计量或计数指标输入SPSS12.0统计软件包及Microsoft Office Excel 2003进行统计学处理。按以下标准将155例分为正常组和疾病组两组。正常组包括正常肝脏、局灶性脂肪肝、少许肝脏小囊肿或小钙化、单个小血管瘤(≤3cm)以及对肝血流无影响的远处病变等病例;疾病组包括原发或继发性肝癌、肝硬化、弥漫性脂肪肝、多囊肝、多发血管瘤或单个大血管瘤(>3cm)、胰腺癌、肝内外胆管扩张、肝血更多还原

【Abstract】 Objective: To study the optimal scanning time using 64-detector row helical computed tomography (GE LightSpeed VCT, VCT) in hepatic computed tomography angiography (CTA).Materiels and Methods: From Oct 2005 to Feb 2006, a total of 155 patients (96 men, 59 women, range 13-88 years, mean age 55.59 years) underwent the upper abdomen VCT scans, and had both unenhanced and enhanced scans. The enhanced scans performed at HAP, PVP and HVP by using Smart Prep technique in the abdominal aorta after injected contrast materials from median cubital vein. Among of the cases, 25 cases underwent Test Bolus technique in the abdominal aortas and 39 cases underwent Test Bolus technique in the portal veins. The indices of statistic datum included time, CT values and grades of the hepatic vascular branches. The images and datum were treated by cooperating VCT and Advantage Windows 4.2 workstation. The values of measuring and counting were statistically analyzed by using the software of SPSS 12.0 and the Microsoft Office Excel 2003. The cases were grouped under two heads. The normal group included the normal liver, the focal adiposis更多还原