Fig. 2.

Fetal cerebellar T₂-weighted MR images in transverse, sagittal and coronal planes. A1, A2, A3, A4 and A5 are the transverse MR images at 14 weeks of GA (W), 16W, 18W, 19W and 21W. B1, B2, B3, B4 and B5 are the sagittal MR images at 14W, 16W, 17W, 20W and 22W. C1, C2, C3, C4 and C5 are the coronal MR images at 14W, 17W, 19W, 20W and 21W. 1, fourth ventricle; 2, vermis; 3, dentate nucleus; 4, primary fissure; 5, prepyramidal fissure; 6, postpyramidal fissure; 7, posterolateral fissure; 8, middle cerebellar peduncle; 9, tegmento-vermian angle.