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目的 :应用螺旋CT肝脏动态扫描评价造影剂容量、注射速度、延迟扫描时间、病人体重与肝脏增强的定量关系。方法 :73例病人随机分为 4组 ,分别给予不同的造影剂容量、注射速度 ,行肝脏平扫和动静脉期增强扫描 ,测量其各参数值 ,并作统计学分析。结果 :高流量组高峰CT值大于低流量组 ,高峰时间亦提前 ;12 0ml组与 10 0ml组比较 ,其高峰CT值和高峰时间有统计学差异 (P <0 0 5 )。CEI达到 45HU或更高 ,在 5 0— 75kg和大于 75kg组对应的造影剂容量为 10 0ml和 12 0ml。结论 :肝脏增强的程度与造影剂注射速度和容量呈一定的正相关 ,与病人体重呈负相关
OBJECTIVE: To evaluate the quantitative relationship between contrast medium volume, injection speed, delayed scan time, patient’s body weight and liver enhancement by using spiral CT hepatic dynamic scanning. Methods: Seventy-three patients were randomly divided into four groups. The contrast medium volume, injection speed, liver plain scan and arteriovenous phase contrast-enhanced scanning were respectively performed. The parameters were measured and statistically analyzed. Results: The peak CT value of high-flow group was higher than that of low-flow group, and the peak time was earlier. The peak CT value and peak time of 120 ml group were statistically different from those of 10 0 ml group (P <0.05). The CEI reached 45HU or higher, corresponding to a contrast medium volume of 100ml and 120ml in the range of 50-75kg and greater than 75kg. Conclusion: The degree of liver enhancement is positively correlated with the injection speed and volume of contrast medium, and negatively correlated with the body weight