【摘要】 目的 :探讨腹部CTA时Boluspro技术中不同触发阈值对MSCT血管成像质量的影响 ,评价Boluspro技术在MSCTA中的应用价值。方法 :无明显循环系统疾病者 5例 ,标准量注射对比剂后 ,绘制主动脉强化上升期时间 密度曲线。40例患者行Boluspro触发CTA扫描 ,随机分成A、B、C三组 ,触发阈值分别设置为 12 0HU、15 0HU、180HU ,比较三组触发时间、实际触发值、主动脉强化值和MSCTA血管成像质量。结果 :40例均成功完成Boluspro自动触发扫描 ,A组和B组在触发时间和MSCTA血管成像质量评价上均无明显差异 ,但与C组有明显差异 ;三组的实际触发值均有明显差异 ,而CTA中主动脉强化值均无明显差异。结论 :Boluspro可以为MSCTA提供理想的延迟扫描时间 ,腹部CTA扫描时Boluspro技术选择主动脉阈值以 12 0～ 15 0HU为佳更多还原

【Abstract】 Objective:To assess the value of Boluspro tracker technique used in MSCT angiography,and to study the effect of different thresholds to MSCT angiography.Methods:Five volunteers without cardio-vascular disease underwent single-level dynamic scan at hepatic hilar level after bolus injection of routine dose contrast media,and the time-density curve of aorta in rising period was drawn from them.MSCT angiography was performed with Boluspro tracker in 40 patients,who were divided into three groups according to the tracker threshold of 120HU,150HU and 180HU respectively.The trigger time,trigger value,attenuation of aorta and the quality score of angiography in three groups were compared.Results:The Boluspro triggered the MSCT angiography scan successfully in all 40 cases.There was no significant difference between the trigger time,trigger value,attenuation of aorta and the quality score of angiography in group A and group B,but group C had longer trigger time than group A and B,and the quality score of angiography was less than the other group.Conclusion:Boluspro tracker in MSCT angiography is a reliable tool to determine optimal delayed time of scanning,which can offer high-quality images;the appropriate threshold in angiography of the abdominal arteries is about 120～150HU.更多还原