Focal bilateral thalamic, posterior internal capsule showing hyperdensity and calcification in CT scan and extensive involvement of deep white matter is characteristic of
Krabbe's disease (globoid leukodystrophy).
Other features :

Hypodensity on T2 MRI.
Involve cerebellar white matter.
Alexander's disease
Metachromatic leukodystrophy
Krabbe's disease
Multiple sclerosis