CT Brain Anatomy
Calcified structures

Key points

  • Commonly calcified structures of the brain include the choroid plexus, pineal gland, basal ganglia and falx
  • Use of CT 'bone windows' is helpful in differentiating calcified structures from acute haemorrhage

There are several structures in the brain which are considered normal if calcified. Knowledge of these structures helps avoid confusion, especially when considering if there is intracranial haemorrhage present.

The commonly calcified structures include the choroid plexus, the pineal gland, the basal ganglia, and the falx.

Calcified choroid plexus - CT brain

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Calcified choroid plexus

  • In adults the choroid plexus of the lateral ventricles is almost always calcified

Calcified pineal gland - CT brain

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Calcified pineal gland

  • The pineal gland is located immediately posterior to the third ventricle
  • It is very commonly partly or fully calcified in adults

Calcified basal ganglia - CT brain

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Calcified basal ganglia

  • Calcification of the basal ganglia is common in elderly patients

Calcified falx cerebri - CT brain

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Calcified falx cerebri

  • The falx is commonly calcified in adults
  • If viewed on brain windows only, calcification of the falx can be mistaken for acute intracranial blood
  • Use of CT 'bone windows' show calcification of the falx more clearly