Why the study?
Does duplex ultrasonography accurately predict the degree of internal carotid arterial stenosis compared to arteriography?
Does duplex ultrasonography accurately predict the degree of internal carotid arterial stenosis compared to arteriography?
Duplex ultrasonography is highly accurate for classifying internal carotid artery stenosis above or below a 70% threshold but is less effective for detailed subclassification.
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May support duplex for binary 70% carotid stenosis classification; leaves open accuracy for finer grading and broader validation.
Grant et al. (2000) studied this question.