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Fig. 5B. —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. On MDCT virtual angioscopic image, view from distal main pulmonary artery is shown with left pulmonary artery (on right of image) and right pulmonary artery (on left of image) marked with bidirectional arrow. Patent ductus arteriosus (arrow) is visible in main pulmonary artery, adjacent to left pulmonary artery.