MRI basal ganglia

Playlist contributed by: Dr Numan Kutaiba

Acute vs chronic symptomatolgy:

Acute ddx:

- hypoxic-ischaemic encephalopathy (cardiac or respiratory arrest)

- vascular insults

- toxin/drug 

- hypoglycemia (high T2/FLAIR) / hypeglycemia (high T1)

 

Site:

- basal ganglia and cortes > hypoxic or CJD

- thalamus: hockey stick sign > variant CJD

- caudate atrophy > huntington

- globus pallidus - eye of the tiger: T2 hyperintense centre surrounded by T2 hypointense rim from iron accumulation > NBIA Neurodegeneration with Brain Iron Accumulation / paediatric patients

- globus pallidus > CO poisoning.

- putamen > cyanide and methanol. may result in haemorrhagic necrosis of putamen. methanol may present with optic neuritis

- medial thalami infarcts: artery of Percheron or internal cerebral vein thrombosis

 

Signal characteristics:

high T1 > hepatic encephalopathy, parenteral nutrition, hypermagnesemia, non-ketotic hyperglycemic state, Wilson's

also high T1 in internal cerebral vein or straight sinus > thrombosis

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rID: 4498
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