Figure 5a. Postoperative evaluation of LIMA graft patency in a 73-year-old man. (a) Coronal volume-rendered image of the thoracic aorta shows normal appearance of the LIMA graft (arrow). A = aorta, RVOT = right ventricular outflow tract. Note the normal appearance of the right coronary artery (arrowhead). (b) Sagittal image shows the relationship of the LIMA graft (arrow) to the sternum. Note the distance between the graft and the sternum. This LIMA graft is at low risk for injury during sternal reentry.