个体化对比剂注射方案在256层CT冠状动脉成像中的应用

目的探讨个体化对比剂注射方案在256层CT冠状动脉成像中的应用价值。方法 100例临床怀疑冠心病需接受冠状动脉CT(CTA)检查者,按照对比剂注射方案个体化原则,对比剂总量(ml)=患者体重(kg),对比剂流率ml/s=对比剂总量/(扫描时间+8)ml/s,同样流率追加30ml生理盐水}进行冠脉CTA检查,测量升主动脉根部左冠开口处CT值并对冠状动脉的显示进行评分,分析对比剂注射方案个体化的可行性。结果按照个体化对比剂注射方案行冠脉CTA检查后,100例检查者升主动脉根部左冠开口处平均强化程度为(420.19±56.59)HU,冠状动脉显示评分得3分比例为88.78%,得2分比例为11.22%,无得1分者。结论个体化对比剂注射方案在256层CT冠状动脉成像中具有良好的应用价值。

Application of the individual protocol of contrast medium injection in coronary angiography by 256-slice CT

Objective To investigate the application value of individual protocol of contrast medium injection in coronary angiography by 256-slice CT.Methods 100 subjects with clinically suspected coronary disease underwent coronary artery CT inspection,according to the individual principle of contrast agent injection plan,that is,total amount of contrast agent(ml) equals to patient’s body weight(kg),discharge rate of contrast agent(ml/s) equals to total amount of contrast agent /(trace time +8) ml/s,and 30 ml physiological saline is supplemented if the discharge rate is similar.Subsequently,the CT value of left crown jaw opening in ascending aorta root was measured and the coronary artery’s demonstration was graded so as to analyze the feasibility of individual plan of contrast agent injection.Results After the CTA inspection via the individuation of contrast agent injection plan,the mean strengthening degree of left crown jaw opening in ascending aorta root of these 100 patients was(420.19±56.59) HU.The coronary artery demonstrated scale was 3 in 88.78%,2 in 11.22%,and 1 in none.Conclusion Individuation of contrast media injection protocol is useful in heart coronary angiography by 256-slice CT.