Diagnostic ultrasound ( PDFDrive )

CHAPTER 45 Neonatal and Infant Brain Imaging 1519
A
B
C
D
FIG. 45.9 Mastoid Fontanelle Images at Fourth Ventricle Level in Posterior Fossa. (A) Normal cerebellar hemispheres (C), cerebellar vermis
(V), fourth ventricle (4), cisterna magna (CM), cisterna magna septa (arrow), choroid plexus in roof of fourth ventricle (arrowheads). (B) Normal axial
cisterna magna. Note the radiating folia of the cerebellar hemispheres that contain relatively hypoechoic neural tissue and are surrounded by
echogenic leptomeninges in the multiple cerebellar issures. (C) Low posterior fossa view through the vallecula (arrow). (D) Severe enlargement
of the fourth ventricle in an infant with posthemorrhagic hydrocephalus.
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B
FIG. 45.10 Mastoid Fontanelle Images of the Midbrain Level Above Fourth Ventricle in Neonates With Posthemorrhagic Hydrocephalus. (A)
Mild posthemorrhagic hydrocephalus, axial plane at the level of the atria of the lateral ventricle (A), frontal horns (f), thalami (T), and third ventricle
(arrow). (B) Axial plane in an infant with moderate posthemorrhagic hydrocephalus, third ventricle (arrow).