【摘要】 目的:通过大小剂量团注测试的对比研究,探讨64排螺旋CT脑血管成像(64 rows spiral CT cerebral angiography)的最佳扫描延迟时间。方法:选取69例成年志愿患者,分别以20ml和60ml对比剂(优维显Ultravist 370mgI/ml)作团注测试(Test bolus),获得大小剂量2次团注测试的达峰时间,计算2次达峰时间的差值。结果:本组69例志愿者中,2次团注测试动脉达峰时间差值多为10s,共有57例,占83%;静脉(矢状窦)的2次达峰时间差值较为恒定:59例差值为8s,占85.5%。结论:64排螺旋CT脑血管成像检查时用小剂量团注测试的达峰时间加上8s(中位数10s-起始层面至兴趣层面的扫描时间2s),设置为扫描延迟时间,能够保证获取满意的图像质量,确保检查成功。更多还原

【Abstract】 Objective:To evaluate the optimal scan delay time of 64 rows spiral CT cerebral angiography by the comparative study of high and low dose test bolus.Methods:Select 69 adult voluntaty patients,take test bolus with 20ml and 60ml contrast medium respectively,then getting 2 peak time of test bolus with high and low dose,calculate the difference of 2 peak time.Results:The arterial peak time difference between high and low dose test bolus of 69 cases,57(83%) cases are 10 seconds,while the venous peak time difference of the same 69 cases,59(85.5%) cases are 8 seconds.Conclusion:The scan delay time of 64 rows spiral CT cerebral angiography could be set by using a peak time of low dose test bolus,plus 8(seconds Median 10 seconds reduce 2 seconds scan time which are taken from the start slice to interest slice),so as to guarantee the satisfactory image quality and ensuring success of the examination.更多还原