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Fig. 4D. MRI of twins at 29 weeks' gestation with meconium peritonitis
in twin B secondary to small-bowel atresia. Twin B did not have cystic
fibrosis. Axial T2-weighted image of twin B shows dilated loops of bowel
(white arrows) with intermediate signal fluid. Ascites (black
arrows) is noted to have slightly higher signal intensity than adjacent
bowel contents. Placenta and twin A are noted.