Axial non-contrast
Modality: CT (non-contrast)

- “ Perimesencephalic hemorrhage is a distinct type of subarachnoid hemorrhage confined to the basal cisterns around the midbrain (typically the inter...”

Used in the following article:

  • Thunderclap headache - “ A thunderclap headache is a very sudden onset headache, and often described as being hit in the head with a baseball bat (cricket bat etc... presu...”
  • Perimesencephalic subarachnoid hemorrhage - “ Perimesencephalic subarachnoid hemorrhage (PMSAH) is a distinct pattern of subarachnoid hemorrhage (SAH), which is centered on the basal cisterns ...”
  • Subarachnoid hemorrhage - “ Subarachnoid hemorrhage (SAH) is a type of extra-axial intracranial hemorrhage and denotes the presence of blood within the subarachnoid space. E...”

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