Figure 1

Cranial view of the pulmonary arteries in a patient with repaired Tetralogy of Fallot. Differential pulmonary perfusion by 4D-PC was measured at 58% to the right lung and 42% to the left lung, while regurgitant fraction at the pulmonary valve was measured at 39%. By nuclear scintigraphy, split perfusion was measured at 65% to the right lung and 35% to the left lung.