Abstract
The intracranium is routinely assessed in the 11–14 weeks US examination. The intracranium is better studied during the 12–14 weeks gestational age than the 11th week. The anatomy of the brain at this stage differs from that in the mid trimester. The corpus callosum has not yet developed, and hence the cavum septum pellucidum (CSP) is not seen. The vermis is yet to develop, and hence the ‘open fourth ventricle’ is a normal finding. The normal sonoanatomy in the axial transventricular, transthalamopeduncular and transcerebellar sections and midsagittal section has been described in the Chap. 1.
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Rama Murthy, B.S. (2019). CNS Anomalies Between 11 and 14 Weeks. In: Imaging of Fetal Brain and Spine. Springer, Singapore. https://doi.org/10.1007/978-981-13-5844-9_8
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DOI: https://doi.org/10.1007/978-981-13-5844-9_8
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