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Three-dimensional ultrasonography of fetal brain at 20 weeks’ gestation: (a) multiplanar analysis after a volume acquisition with corpus callosum mode through the anterior part of the sagittal suture showing corpus callosum (CC), and (b) multiplanar analysis after a volume acquisition through the posterior fontanelle showing corpus callosum (CC), cavum septi pellucidi (C.S.P.), thalamus (TH), brainstem (BS), and cerebellar vermis (CV).
