Zhao D, et al. - Researchers performed this prospective study to compare measurements of normal fetal vermis at 24–32 weeks of gestation obtained in the median plane by transabdominal 2D-ultrasound (US), 3D-US, and magnetic resonance imaging (MRI). Decremental visualization rates of MRI, 3D-US, and transabdominal 2D-US were observed. In this regard MRI was superior. However, in measuring cerebellar vermis and its surroundings, these 3 imaging modalities correlated well.