From the case: Fetal MRI at 28 weeks - mild unilateral ventriculomegaly
Annotation of normal cerebral development at 28 weeks
First image: the precentral and postcentral sulci (dotted arrows) are now present on either side of the central sulcus (solid arrow). Middle image: further development of the cingulate fissure (straight arrows) and collateral sulcus (curved arrow). Last image: cingulate fissure (dotted line) is in this case well seen on the sagittal series, with continuation into the marginal sulcus (curved arrow). The parieto-occipital (straight arrow) and calcarine (dotted arrow) sulci are also well depicted on this slice.