Ann Pediatr Card Close
 

Figure 1: Reconstruction of 3D MRA dataset, with post-processing to highlight the area of SVC stenosis. The proximal SVC is seen extending superiorly from the right atrium (arrow) with a dimension of 4 × 6 mm for a length of 3.5 mm. Distal to this there is a 5 mm area of nonopacifi cation representing near occlusion of the proximal SVC with a small beak of more distal SVC at the insertion of the azygous vein (arrow) measuring 5 × 5 mm. The azygous arch is mildly narrowed, decreasing in size from 13 × 11 mm distally to 6 × 7 mm as it approaches the SVC. 3D MRA = Three-dimensional magnetic resonance angiography, SVC = superior vena cava

Figure 1: Reconstruction of 3D MRA dataset, with post-processing to highlight the area of SVC stenosis. The proximal SVC is seen extending superiorly from the right atrium (arrow) with a dimension of 4 × 6 mm for a length of 3.5 mm. Distal to this there is a 5 mm area of nonopacifi cation representing near occlusion of the proximal SVC with a small beak of more distal SVC at the insertion of the azygous vein (arrow) measuring 5 × 5 mm. The azygous arch is mildly narrowed, decreasing in size from 13 × 11 mm distally to 6 × 7 mm as it approaches the SVC. 3D MRA = Three-dimensional magnetic resonance angiography, SVC = superior vena cava