BSA指导下不同浓度碘对比剂在肝动脉 增强效能中的对比研究

目的:探讨以体表面积（BSA）为指导评价不同浓度碘对比剂在MSCT肝动脉增强效能中的作用对比。方法:以328例行上腹部CT增强扫描的患者为研究对象，按照对比剂浓度的不同分为研究组和对照组，研究组使用400mgI/mL对比剂，对照组使用370mgI/mL对比剂。对比剂用量按照患者的体表面积计算，注射流率均为2.5mL/s。所有患者均行肝脏三期增强扫描，并对肝动脉进行重建。比较两组患者不同水平腹主动脉强化值、肝动脉各级分支显示率及肝动脉图像质量。结果:研究组在肝门水平、腹腔干水平及肾动脉水平的强化值均显著高于对照组。研究组和对照组在肝动脉各级分支显示率上，二者不存在明显差异。研究组和对照组的图像质量评分存在统计学差异，研究组肝动脉图像质量较对照组更加清晰且边缘更锐利。结论:按照BSA计算对比剂的用量实现了对比剂的个性化用药，400mgI/mL对比剂的使用，减少了对比剂的使用剂量，提高了腹主动脉强化效能，优化了肝动脉的图像质量，值得临床推广。 

Effect of Different Concentrations of Iodine Contrast Agent on MSCT Hepatic Artery Enhancement under the Guidance of Body Surface Area

To evaluate the effects of different concentrations of iodine contrast agent on MSCT hepatic artery enhancement. Methods: A total of 328 patients who underwent enhanced CT scan of the upper abdomen were selected as study subjects. According to different concentrations of contrast agents, they were divided into study group and control group. The study group received 400mgI/mL contrast agent, while the control group received 370mgI/mL contrast agent. The injection flow rate of the contrast agent was 2.5mL/s. All patients underwent three-phase enhanced scan of the liver and reconstruction of the hepatic artery. The enhancement value of abdominal aorta at different levels, the display rate of various branches of hepatic artery and the image quality of hepatic artery were compared between the two groups. Results: The enhancement values of hepatic portal level, peritoneal trunk level and renal artery level in the study group were significantly higher than those in the control group. There was no significant difference in the rate of hepatic arterial branches between the study group and the control group. There were statistically significant differences in the image quality scores of the study group and the control group. The image quality of the hepatic artery in the 400 group was more clear and sharp than that of the control group. Conclusion: The dose of contrast agent is determined by body surface area, which is beneficial to individual use of contrast agent. The use of 400mgI/mL contrast agent can reduce the dose of contrast agent, improve the strengthening efficiency of abdominal aorta and optimize the image quality of liver artery, which is worthy of clinical promotion.