摘要
Abstract
Objective; To explore the virtue of each contrast agent injection scheme in coronary artery angiography with 64-de-tector row spiral CT. Methods; A total of 297 patients undergoing coronary angiography by 64- detector row spiral CT were divided into three groups. Group A(two phases,97 patients)were injected 60-70 ml contrast agent first,then followed by 20 ml saline flush. Group Bl(three injection phases, 101 patients)were injected 40-50 ml contrast agent first,then injected 20-30 ml contrast-saline mixture at 6:4 ratio,then followed by 20 ml saline flush. Group B2(three phases,99 patients)were injected 40-50 ml contrast agent first,then injected 20-30 ml contrast-saline mixture at 7:3 ratio, then followed by 20 ml saline flush. Injection speed was 4. 5-5.0 ml/s. The image quality of coronary,the artifacts of superior vena cava and right ventricle,the visualization of the wall of right ventricle and pulmonary artery were evaluated. Results : The difference of the image quality of coronary between group A,group Bl and group B2 was not significant. The artifacts of superior vena cava and right ventricle in group A was more obvious than group B.but there was no significant difference in group Bl and group B2. Group A was the best in the visualization of the right ventricle wall,and group B2 was better than that of group Bl. Group A was better in the visualization of pulmonary artery than that of group B. The display rate of pulmonary artery in Group B2 was 63. 64%,better than that of group Bl. Conclusion; In coronary CT A, image quality of coronary artery was almost same in each injection plan. Two phase injection plan can provide clear visualization of the wall of right ventricle and pulmonary artery,but the artifacts of superior vena cava and right ventricle was obvious. A contrast-saline mixture at 6:4 ratio after contrast bolus can provide least artifacts of superior vena cava and right ventricle, but the wall of right ventricle and pulmonary artery could not be visualized clearly. A contrast-saline mixture at 7:3 ratio after contrast bolus can provide least artifacts of superior vena cava and right ventricle,and clear visualization of the wall of right ventricle,but pulmonary artery could not be visualized clearly in a majority of cases. We should select the suitable injection plan according to the clinic needs.关键词
体层摄影术,X线计算机/冠状血管造影术/对比剂Key words
tomography,X-ray computed/coronary angiography/contrast media分类
医药卫生
