Figure 3.

Volume rendered computed tomography images showing various types of pulmonary arterial narrowing in tetralogy of Fallot’s. A) Infundibular narrowing (white arrow) and focal narrowing of right pulmonary (black arrow) with post stenotic dilatation. B) Narrowing of main pulmonary artery. C) Atretic main pulmonary artery (black arrow) with hypoplastic right and left pulmonary arteries (arrowheads) and a large major aorta-pulmonary collateral from left subclavian artery supplying left pulmonary artery