CT head (subdural window)

Mr Andrew Murphy and Dr Henry Knipe et al.

The subdural (blood) window can be used when reviewing a CT brain as it makes intracranial haemorrhage more conspicuous, and may help in the detection of thin acute subdural haematomas that are against the calvarium. It is a wider setting than the standard non-contrast window, and there are a number of parameters that can be used: 

  • centre/level 50; window 130 1
  • centre/level 70-100; window 150-300 3
CT examinations
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Article information

rID: 48361
Section: Approach
Synonyms or Alternate Spellings:
  • Blood window
  • Subdural window

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