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Figure 8b. Postoperative spiral CT angiography (3-mm collimation, pitch of 1.7, 24% iodinated contrast agent) performed in a 51-year-old patient, 10 days after left lung transplantation for idiopathic pulmonary fibrosis. (a) Spiral CT scan obtained at the level of the left main pulmonary artery suggests either an anastomotic stenosis or a postoperative kinking (arrowhead). (b) Oblique coronal reformation obtained along the main axis of the left pulmonary artery confirms the presence of an anastomotic stenosis (arrowhead). (c) Similar morphologic information to that shown in b is provided by means of the opacification of the balloon during the angioplasty procedure (the arrow points to the anastomotic stenosis).