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目的研究64层螺旋CT使用低剂量对比剂联合生理盐水在CTA中对脑动脉瘤的应用价值。方法对临床疑有脑动脉瘤51例患者分为三组:甲组90ml对比剂不用生理盐水冲洗;乙组、丙组分别使用70ml、50ml对比剂之后用相同流速生理盐水40ml冲洗。对比剂流速为5.0ml/s。当颈内静脉显影的一刹那开始扫描。利用工作站软件进行图像处理,评估三组血管图像质量及动脉瘤显示情况。结果三组病例动脉瘤的灵敏度、特异性在统计学上没有明显差异,甲组动静脉均显示很好,CT值较高。丙组动脉显示良好,静脉少,污染轻,血管CT值略低。乙组居于二者之间。结论使用低剂量对比剂50ml+40ml生理盐水以5.0ml/s流率注射,不仅可以得到理想的图像,还是一种安全、快速、经济的检查方法。
Objective To study the value of 64-slice spiral CT in the treatment of cerebral aneurysm with low-dose contrast agent combined with saline in CTA. Methods Fifty-one patients with suspected clinical cerebral aneurysms were divided into three groups: Group A (90 ml) without saline; Group B and Group C (70 ml, 50 ml respectively) were rinsed with 40 ml normal saline. The contrast agent flow rate was 5.0 ml / s. When the internal jugular vein imaging began to scan. Workstation software was used for image processing to assess the vascular picture quality and aneurysm status of the three groups. Results The sensitivity and specificity of aneurysm in three groups of patients showed no significant difference in statistics. Group A had good arteriovenous and CT values. Group C artery showed good, less veins, light pollution, blood vessels CT value slightly lower. Group B live in between the two. Conclusions Using a low dose contrast agent 50ml + 40ml saline at a flow rate of 5.0ml / s, not only can the ideal image be obtained, but also a safe, rapid and economical method of examination.