双源CT在冠状动脉搭桥术后随访中的临床应用

Clinical application in follow-up examination of coronary artery bypass grafts with dual-source CT

目的 评价双源CT冠状动脉造影对冠状动脉搭桥术后桥血管病变随访的应用价值.方法 50例冠状动脉搭桥患者,术后6～20个月行双源CT冠状动脉造影检查;对原始数据行VR、CPR、MIP多种图像后处理技术进行重建.由2位有经验的放射科医生对重建图像进行观察,对桥血管通畅性进行分级诊断.结果 50例患者总计140支桥血管,134支桥血管显示良好,其中通畅或狭窄＜50％的桥血管共127支（91％）,狭窄≥50％的桥血管7支（5％）,闭塞未显示的桥血管共6支（4％）.结论 DSCT冠状动脉造影能够清晰显示并评价冠状动脉桥血管病变,尤其是重度狭窄和闭塞的桥血管,可作为冠状动脉搭桥术后随访的有效评价手段.

Objective To value the application of the dual-source CT in the follow-up of coronary artery bypass grafting. Methods DSCT coronary angiography were performed in fifty cases after 6--20 months of the operation of CABG. The raw data were reconstructed using volume rendering （VR）, curved planar reformations （CPR） and multiple planar refor- mations （MPR）. The imaging quality and stenosis of the grafts were evaluated by two professional radiological doctors, and the grading was evaluated. Results A total of 134 grafts were shown clearly in the whole 140. 127 grafts （91% of to- tal） were shown non-stenosis or less than fifty-percent stenosis, 7 grafts （50/00） more than fifty-percent stenosis, 6 grafts （4~） occlusion. Conclusion DSCT coronary angiography can image and evaluate grafts clearly, especially for graft with severe stenosis or occlusion. This can be used as a valuable assessment of follow-up of coronary artery bypass graft.