A comparative study of high and low dose test bolus in 64 rows spiral CT cerebral angiography / 重庆医科大学学报

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.