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. 2022 Apr 25;13:78. doi: 10.1186/s13244-022-01201-y

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© The Author(s) 2022

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Fig. 9 — 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)