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Fig. 1D. —Right aortic arch with aberrant left subclavian artery in 10-year-old girl with cough and suspected pneumonia. Chest radiograph showed mediastinal widening. In this case, accuracies for making correct diagnosis were 100% for all observers and image types. Enhanced anterior view of 3D volume-rendered image shows aberrant left subclavian artery (white arrow) arising as last branch from right aortic arch (R). Also noted is right subclavian artery (black arrow). RC = right common carotid artery, LC = left common carotid artery.