Acute infarct - Dense MCA sign

Hover on/off image to show/hide findings

Tap on/off image to show/hide findings

Acute infarct - Dense MCA sign

  • The left middle cerebral artery (MCA) is very dense due to a thrombus - compare with the density of the normal right MCA
  • A dense artery sign may be seen before any change in the infarcted grey and white matter
  • Low density is already visible in the infarcted area

Clinical information

  • Acute onset right hemiparesis

Acute infarct - Insular ribbon sign

Hover on/off image to show/hide findings

Tap on/off image to show/hide findings

Acute infarct - Insular ribbon sign

  • Loss of definition of the insular ribbon is another sign of an acute infarct
  • The left insular ribbon is not clearly seen in this image
  • The patient presented with a dense right hemiparesis

Clinical information

  • Acute onset right hemiparesis

Old infarct

Hover on/off image to show/hide findings

Tap on/off image to show/hide findings

Old infarct

  • Several months after an acute ischaemic event the brain cells in the infarcted area have died leaving an area of low density
  • This image shows the typical appearance of an old infarct - in this case of the right MCA territory