Intracranial hematomas: imaging by high-field MR

Radiology. 1985 Oct;157(1):87-93. doi: 10.1148/radiology.157.1.4034983.


Twenty intracranial hematomas between 1 day and over 1 year old were imaged using magnetic resonance at 1.5 T, with T1- and T2-weighted spin-echo pulse sequences. Characteristic intensity patterns were observed in the evolution of the hematomas, which could be staged as acute (less than 1 week old), subacute (greater than 1 week and less than 1 month old), or chronic (greater than 1 month old). Acute hematomas were characterized by central hypointensity on T2-weighted images (WIs). Subacute hematomas had peripheral hyperintensity on T1-WIs and then on T2-WIs. This hyperintensity proceeded to fill in the hematoma in the chronic stage. In subacute and chronic hematomas, there was hypointensity on T2-WIs in the immediately adjacent part of the brain. On T2-WIs of acute and subacute hematomas, the nearby white matter was characterized by hyperintensity, consistent with edema. A different mechanism is proposed for each of the three characteristic intensity patterns. Two of these mechanisms increase in proportion to the square of the magnetic field magnitude.

MeSH terms

  • Adolescent
  • Adult
  • Aged
  • Cerebral Hemorrhage / diagnosis*
  • Child
  • Female
  • Hematoma, Epidural, Cranial / diagnosis
  • Hematoma, Subdural / diagnosis
  • Humans
  • Magnetic Resonance Spectroscopy*
  • Male
  • Middle Aged
  • Time Factors