不同浓度CT对比剂在胰腺动脉CT成像中的应用研究

Application on different contrast media concentration in the pancreatic CT angiography scanning

目的比较不同浓度对比剂在64排螺旋CT胰腺动脉检查中的显示效果。方法将本院120例行腹部增强CT检查的患者随机分成A、B两组,每组各60例,分别注射300 mgI/ml(A组)和370 mgI/ml(B组)2种浓度对比剂,对比剂用量算法及注射速度两组一致,分别为0.5 gI/kg体重和4 ml/s。利用MIP(最大密度投影)、VR(容积重现技术)、MPR(多平面重组)等技术来显示胰腺动脉。结果B组腹主动脉腹腔干开口处强化CT值明显高于A组,差异具有统计学意义(P<0.01)。B组各胰腺动脉显示评分均明显高于A组,差异具有统计学意义(P<0.05)。B组各胰腺动脉显示率均高于A组,其中AIPDA、PIPDA、DPA、TPA、PMA、CPA的差异具有统计学意义(P<0.05)。结论当注射370 mgI/ml对比剂检查胰腺动脉时,胰腺各动脉可获得较好的显示。

Objective To compare the effects of the different contrast media concentration on the visualization of pancreatic arteries using 64-Detector Spiral CT.Methods 120 cases who underwent abdominal enhancement CT scanning were randomly divided into group A(n=60)and B(n=60).The contrast media concentration was 300 mgI/ml for group A and370 mgI/ml for group B respectively,both groups shared the same contrast media dose algorithm and injection speed,with0.5 gI/kg body weight and 4 ml/s respectively.Reformating the pancreatic arteries via MIP(maximum intensity projection),VR(volume rendering)and MPR(multi-planar reconstruction).Results The CT value of the abdominal aortic celiac opening of group B is significantly higher than A(P<0.01).The visualization scores of pancreatic arteriesin Group B are significantly higher than A(P<0.05).The visualization ratios of pancreatic arteriesin Group Bare higher than A,the differences of AIPDA、PIPDA、DPA、TPA、PMA、CPA between the 2 Groups have statistically significant(P<0.05).Conclusion Pancreatic arteries could have a better visualization by using 370 mgI/ml contrast media in pancreatic artery scanning.