[Duplex ultrasound for diagnosing symptomatic carotid stenosis in the extracranial segments]

To assess the accuracy of duplex ultrasound (DUS) in individuals with symptomatic carotid stenosis verified by either DSA, MRA, or CTA.

If possible, we will assess and evaluate in subgroup analyses any method that could improve accuracy additional to duplex, that is microbubbles contrast, Power Doppler or similar, and color mode.

This is a protocol.

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