Fig. 5

Examples of cases where radiologists consider non-gallbladder as gallbladder. a–e These belong to a 59-day-old female infant with biliary atresia, in which the arrow in a refers to the correct gallbladder (small gallbladder) shown in the original sonographic video. The hepato-intestinal space in b and c, the blood vessels in d, and the gut in e are non-gallbladder structures (rectangles) in smartphone photos, which were considered as gallbladder by four radiologists. f–j These belong to a 58-day-old male infant with non-biliary atresia, in which the arrow in f refers to the correct gallbladder (unfilled gallbladder) in the original sonographic video. The hepato-intestinal space in g and the gut in h–j are the non-gallbladder structures (rectangles) in smartphone photos, which were considered as gallbladder by four radiologists. Sonographic gallbladder videos of these two infants are available in Additional file 4: Video S3 for the first infant and in Additional file 5: Video S4 for the second infant