MR imaging in Fahr disease

Area of Science:

• Neurology
• Radiology
• Medical Imaging

Background:

• Fahr disease is characterized by calcifications in the brain, typically detected by CT scans.
• These calcifications often affect the dentate nuclei of the cerebellum, basal ganglia, and cerebral white matter.

Observation:

• This study utilized magnetic resonance imaging (MRI) with a multiple echo technique to characterize Fahr disease calcifications.
• Three distinct patterns of calcification were observed across different brain regions.

Findings:

• Cerebellar calcifications were undetectable using this MRI technique.
• Basal ganglia calcifications presented as low or no signal, appearing as "black" areas across four echoes.
• White matter calcifications exhibited high signal intensity, appearing intensely white in the four echoes.

Implications:

• The varied MRI signal patterns suggest different stages or metabolic states of calcification in Fahr disease.
• Basal ganglia calcifications may represent predominantly inert calcium deposits.
• White matter calcifications might indicate a higher concentration of binding proteins and mucopolysaccharides.