Extracardiac Fontan procedure biphasic acquisition protocol.
(A) Coronal reformatted maximum intensity projection
(MIP) CT image in the early arterial phase shows well-opacified aortic
root. The Fontan circuit is not opacified, giving false impression of
thrombosis. (B) Coronal reformatted MIP CT image in the
late venous phase shows uniform opacification of the Fontan conduit. Ao
= aorta, C = conduit, LPA = left pulmonary artery, RPA = right pulmonary
artery, SVC = superior vena cava.