Abstract：Objective: To investigate the application of 320-row volume CT scan in coronary artery bypass grafts(CABG) imaging. Method: Fifty-five cases(male 36) after 3~9 months of the operation of CABG were enrolled in this study and underwent coronary artery graft imaging using 320-row volume CT scan. Total 126 grafts(52 arterial grafts, 61 venous grafts and 13 sequential grafts) were evaluated. Grafts images were reconstructed using multiple planar reformations(MPR), curved planar reformations(CPR) and volume rendering(VR). The image quality(good, moderate and poor) and stenosis of grafts(non-stenosis, slight, mild and severe stenosis) were evaluated. Result: All the 55 patients(126 grafts) accepted 320-row volume CT scan after CABG operation. 116 grafts were filled with contrast agent and the other 10 grafts which no contrast agent in lumen were considered as total occlusions. The image quality of 116 grafts was good(97 grafts, 83.6％) or moderate(19 grafts, 16.4％）. No poor image quality was observed. Calcifications of wall were found in 8 grafts. Lumen stenosis was found in 5 arterial grafts, 5 venous grafts and 2 sequential grafts. Conclusion: 320-row volume CT scan can image grafts clearly and can be used to evaluate stenosis of graft. It is a good noninvasive method for graft imaging after CABG operation.
2011, Vol. 22 
