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Fig. 5A. —Patent ductus arteriosus in 2-year-old boy with murmur on
physical examination. Patent ductus arteriosus was suspected and CT was
subsequently performed. Enhanced axial CT image fails to show patent ductus
arteriosus between aorta (A) and pulmonary artery (P). This image was
interpreted as normal by all three observers. Confidence level was 5 in all
three cases.
