64排螺旋CT脑血管成像大小剂量团注测试的对比研究  

A comparative study of high and low dose test bolus in 64 rows spiral CT cerebral angiography

作　　者：李信友[1] 曾勇明[1] 吕发金[1] 胡志华[1] 张志伟[1] 石军[1] 陆云峰[1] 

机构地区：[1]重庆医科大学附属第一医院放射科,重庆400016

出　　处：《重庆医科大学学报》2008年第8期984-986,989,共4页Journal of Chongqing Medical University

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。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.

关 键 词：达峰时间 体层摄影术 X线计算机 脑血管造影术 

分 类 号：R814.42[医药卫生—影像医学与核医学]