Use of MRI in Evaluating Fetal Ventriculomegaly
Use of MRI in Evaluating Fetal Ventriculomegaly
Use of MRI in Evaluating Fetal Ventriculomegaly
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Lisa McLeod HMS III<br />
Gillian Lieberman, MD<br />
Landmarks <strong>of</strong> fetal bra<strong>in</strong><br />
development visible by <strong>MRI</strong><br />
Glial Cell Migration<br />
Visible @ 22 weeks GA<br />
Cells migrate from<br />
ventricular periphery<br />
toward cortical ribbon<br />
T2 Hypo<strong>in</strong>tense<br />
Sulcation/Ventricles<br />
Sulcation/Ventricles<br />
Axonal Maturation/Myel<strong>in</strong>ation<br />
Maturation/ Myel<strong>in</strong>ation<br />
Caudal-cephalic/Dorsal<br />
Caudal cephalic/Dorsal-ventral ventral<br />
T2 Hypo<strong>in</strong>tense<br />
Agyric (exc. Sylvian) Sylvian)<br />
until<br />
24 weeks<br />
Physio Hydrocephalus<br />
resolves from 14 weeks<br />
Both T2 Hyper<strong>in</strong>tense<br />
3
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