Question 985

Question contributed by Frank Gaillard ◉ ◈

Disclosures and question data

Why can thin acute intracranial subdural hemorrhages be difficult to identify on routine non-contrast CT of the brain?

acute hemorrhage/clot has a density higher than the upper limit of routine CT window width and level

acute hemorrhage/clot has a density lower than the lower limit of routine CT window width and level

acute hemorrhage/clot has a density similar to bone (about 1000HU) and thus looks the same as bone

acute hemorrhage/clot has a density similar to brain parenchyma (about 30-40HU) and thus looks the same as cortex