Head CT > Stroke > Hyperdense Vessel

Hyperdense Vessel Sign

A hyperdense vessel is defined as a vessel denser than its counterpart and denser than any non-calcified vessel of similar size. This is seen in 25% of stroke patients. In patients presenting with clinical deficit referable to the middle cerebral artery territory, the hyperdense vessel sign is present 35-50% of the time. This sign indicates poor outcome and poor response to IV-TPA therapy.

High density in the right middle cerebral artery (arrowheads).
Compare it with the normal left middle cerebral artery (arrow).

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