不同碘浓度对比剂在MSCT肝脏动脉期血管成像中的作用对比及临床应用

目的：评价不同碘浓度对比剂在多层螺旋CT（MSCT）肝脏动脉期血管成像中的作用对比及临床应用。方法：60例患者随机分为两组，分别采用小同碘浓度对比剂进行腹部增强扫描：A组对比剂为碘海醇300（300mgI／mL），B组对比剂为优维显370（370mgI／mL）。注射速率均为3．0mL／s。分别测量动脉期轴位扫描腹腔干水平、肾动脉水平、髂动脉分叉水平腹丰动脉cT值，并进行比较。图像后处理采用容积再现（VR）法，分析不同浓度腹主动脉及其分支的增强显示情况，并对图像质量进行评价。结果：B组腹主动脉各水平的CT强化平均值较A组高（P〈0．05，差异有统计学意义）：用VR法行肝动脉血管成像，B组对比剂对腹主动脉及其分支显示效果更佳（P〈0．05，差异有统计学意义）。结论：MSCT进行肝动脉血管成像时，在注射速率相同的情况下，B组注射的对比剂总量少于A组，但动脉显示效果好于A组，即采用低剂量、高浓度对比剂可以获得满足诊断需要图像。

The Effect of Different Iodine Concentration of Contrast Agent in MSCT Hepatic Arterial Angiography and Its Clinical Application

Objective： To evaluate the effect of different iodine concentration of contrast agent in MSCT hepatic arterial angiography and its clinical application. Method： 60 patients underwent abdominal scan. They were randomly divided into two groups and were injected with different concentration of iodine contrast agent. Group A was injected with contrast agent iohexol 300 （300 mgl/mL） and group B was injected with contrast agent Ultravist 370 （370 mgl/mL）. The injection rate of two groups were 3.0 mL/s. We measured the level of the celiac axis, the level of the renal artery, lilac artery bifurcation at the abdominal aortic CT value and compared the CT value of the corresponding level of abdominal aortic. VR method was used in image processing. Abdominal aorta and its branches were analyzed and the image quality was evaluated. Results： The CT value of the group B was higher than that of group A （P 〈 0.05, the difference has statistical significance）. Using VR method for hepatic artery angiography, group B has better effect in displaying the abdominal aorta and its branches （P 〈 0.05, the difference has statistical significance）. Conclusion： At the same injection rate, the contrast agent volume of group B is less than that of group A, but the image quality of the group B is higher than that of the group A.