Page 17 - SONO 260 The Fetal Head and Brain
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The Cisterna Magna
The cisterna magna, located in the posterior fossa of the cranium, is the largest cistern in the head.
On sonography, the cisterna magna appears as an anechoic, fluid-filled space, posterior to the cerebellum, between the cerebellar vermis and the interior surface of the occipital bone.
It is considered common to find some small septations within the cisterna magna.
