Pediatric Radiology > Neurological > Developmental Abnormalities > Myelination Abnormalities > White Matter Age


White Matter Age

Flow Chart for myelination to determine white matter age (WMA)

Chronologic age <6 months use T1 weighted images

1 Cerebellum Not myelinated WMA <3 months
2 Splenium of corpus callosum Not myelinated WMA 3-4 months
3 Genu of corpus callosum Not myelinated WMA 4-6 months
Myelinated Proceed to T2 weighted images

   

Chronologic age >6 months use T2 weighted images

1 Splenium of corpus callosum Not myelinated WMA <6 months
2 Genu of corpus callosum Not myelinated WMA 6-8 months
3 Anterior limb of internal capsule Not myelinated WMA 8-11 months
4 Frontal white matter Not myelinated WMA 11-14 months
5 Peripheral extension/
fine arborization 		Not myelinated WMA 14-18 months
Myelinated Adult WMA > 18months