【摘要】 目的:探讨不同对比剂用量及注射速率情况下,多层螺旋CT脑血管成像的应用效果。资料与方法:将96例体重指数18.5～22.9的可疑脑血管病变患者随机分为A组、B组、C组3组(每组32例)。A组:注射对比剂75mL后用25mL生理盐水冲刷,速率4.5mL·s-1;B组:注射对比剂50mL后用40mL生理盐水冲刷,速率4.5mL·s-1;C组:注射对比剂50mL后用40mL生理盐水冲刷,速率4.0mL·s-1。测量颅内段颈内动脉、大脑中动脉、大脑前动脉的CT值,同时评价血管显示的效果。结果:3种注射方案动脉的平均强化程度差异之间无统计学意义,A组与B组,A组与C组重组血管清晰度差异无统计学意义。结论:行脑血管MSCTA在能够获得满足检查要求的图像效果的前提下,可以适当降低对比剂用量及注射速率。更多还原

【Abstract】 Objective:To investigate the effect of contrast material flow rate and dose on intracranial vascular spiral computed tomographic angiography(SCTA)imaging.Materials and Methods:96 patients(BMI18.5～22.9) suspected cerebral-diseases were divided into three groups randomly and received MSCT cerebral-angiography with three different injection protocols respectively.Group A:370 mg·mL -1 ×4.5 mL·s -1 ,75 mL contrast material was injected with an SF.Group B:370 mg·mL -1 ×4.5 mL·s -1 ,50 mL of contrast material with an SF.Group C: 370 mg·mL -1 ×4.0 mL·s -1 ,50 mL contrast material with an SF.The attenuation of the internal carotid,middle cerebral,and anterior cerebral arteries were measured.The demonstration of vessels was also assessed.Results: There were no significant attenuation differences of the arteries among the three groups,neither were any significant differences noted on the visual assessment.Conclusion:Contrast quantity and injection velocity may be decreased,but the imaging should still be clear.更多还原