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Fig. 5A. —Technique of virtual angioscopy is applied to images of noncalcified patent ductus arteriosus in 50-year-old woman with New York Heart Association grade II dyspnea [14] and body mass index of 36. Three-dimensional model of aortic arch and pulmonary trunk generated from multidetector CT (MDCT) data is used for navigation. Duct is indicated by arrow.