Acute infarct - Dense MCA sign
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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
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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
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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