Fig. 10

Supravalvular pulmonary artery stenosis in a foetus at 21 weeks gestation. The imaging was performed 5 days after termination of pregnancy. Transverse images of the outflow tracts on post-mortem ultrasound (a) and T2 weighted MRI at 1.5T (b) both demonstrate a dilated main pulmonary artery (solid arrows). The transverse four cardiac chamber view on ultrasound (c) and MRI (d) show a dilated and thick-walled right ventricle (dotted arrow) and small atrial septal defect (arrowhead). Given the small size of the foetus, the findings were more easily appreciated on ultrasound than MRI