Fig. 9
From: Complex adult congenital heart disease on cross-sectional imaging: an introductory overview
Axial CT images in a patient with an extra-cardiac conduit Fontan circuit. A Inadequate protocolling which resulted in suboptimal opacification of the circuit. Note that it is impossible to identify a true thrombus. B A single contrast phase, delayed phase acquisition protocol was subsequently used in the same patient which opacified the Fontan circuit adequately and allowed identification of a thrombus in the right main pulmonary artery (yellow arrow)