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In light of its excellent safety profile, ultrasound does not usually figure into debates about whether imaging is being overused in this country. However, new recommendations from the U.S. Preventive Services Task Force (USPSTF) suggest there may be at least one indication for which ultrasound is being used inappropriately: screening for carotid artery stenosis (CAS) in asymptomatic patients.

Dim view of ultrasound for CAS in asymptomatic