生理盐水
医学
腹主动脉
主动脉
对比度(视觉)
静脉
核医学
门静脉
显著性差异
对比度增强
放射科
外科
内科学
磁共振成像
计算机科学
人工智能
作者
Fuminari Tatsugami,Mitsuru Matsuki,Yuji Inada,Go Nakai,Masato Tanikake,Shushi Yoshikawa,Isamu Narabayashi
出处
期刊:British Journal of Radiology
[British Institute of Radiology]
日期:2007-04-01
卷期号:80 (952): 231-234
被引量:16
摘要
The effects of saline pushing after contrast material injection were investigated as well as the possibility for this technique to reduce contrast material doses in liver CT examinations. 52 patients were divided randomly into three groups: 100 ml of contrast material (300 mg I ml(-1)) only (A; n = 19), 100 ml of contrast material pushed with 50 ml of saline solution (B; n = 17), and 85 ml of contrast material pushed with 50 ml of saline solution (C; n = 16). Single-level images were obtained at the level of the main portal vein after the initiation of contrast material injection. There were no significant differences in the mean peak enhancement values (PE) and the mean time to peak enhancement values (TPE) of the aorta between the three groups. The mean PE of the portal vein in group B increased 21 HU over that in group A (p<0.05), and there was no significant difference between groups A and C. The mean PE of the liver in group B increased 7 HU over that in group A (p<0.05), and there was no significant difference between groups A and C. The mean TPE of the portal vein was shorter by 4 s (p<0.05), and that of the liver was shorter by 5 s (p<0.05) in group C compared with those in group A. In conclusion, saline pushing increases the enhancement values of the portal vein and liver, and allows a contrast material dose reduction of 15 ml without decreasing hepatic and vascular enhancement at adequate scan timing.
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