Comparison of the effect of different contrast media concentrations on multi slice spiral CT angiography of abdominal artery

Abstract

Objective To investigate the effect of different contrast media concentrations on abdominal aortic angiography with multi-slice spiral CT. Methods 85 patients underwent abdominal multi slice spiral CT angiography were selected, and they were randomly divided into high concentration group(45 cases) and low concentration group(40 cases) according to random number table method.The high concentration group used 370mgI/mL contrast agent 60mL, and the low concentration group used 300mgI/mL contrast agent 100mL.The abdominal aorta to enhance value, image quality and the incidence of adverse reactions were compared between the two groups. Results The scores of renal artery and abdominal aorta in the high concentration group were significantly higher than those in the low concentration group[(3.76±0.85)points vs.(3.27±0.69)points, (2.57±0.53)points vs.(2.11±0.50)points], the differences were statistically significant(t=2.895, 4.101, all P<0.05). The levels of celiac trunk, renal artery and iliac artery in the high concentration group were significantly higher than those in the low concentration group[(346.37±27.85)Hu vs.(305.74±22.69)Hu, (310.77±28.39)Hu vs.(289.50±19.85)Hu, (301.42±24.87)Hu vs.(276.59±23.10)Hu], the differences were statistically significant(t=7.316, 3.955, 4.750, all P<0.05). No adverse reactions occurred in the two groups. Conclusion High concentration of contrast agent can improve the multi-slice spiral CT angiography in patients with abdominal aorta to enhance value, so as to improve the image quality, and can reduce the dose of contrast agent, and it has high safety and is worthy of promotion. Key words: Tomography, spiral computed; Contrast media; Angiography; Abdomen