Fig. 6

Contrast-enhanced axial CT image (a) from a patient with tetralogy of Fallot (TOF) and a prosthetic pulmonic valve demonstrates severe stenosis of the left and mild stenosis of the right pulmonary artery (arrows). In addition there is an ascending aortic aneurysm. In a different patient (b) with an unrepaired TOF, an aneurysm of the pulmonary trunk (arrow) formed with a chronic thrombus in the right and left pulmonary arteries. Also note the multiple dilated aortopulmonary collaterals. CT angiogram c performed with 30 ml of contrast in a patient with chronic renal failure and a prosthetic pulmonary valve demonstrates a main pulmonary artery aneurysm (measuring 44 mm)