The bottom line: When diagnosing giant-cell arteritis, ultrasonography may be useful; however, there needs to be cautious interpretation of the results that is based on clinical presentation, and pretest probability of the disease is imperative.
Karassa. Meta-analysis: test performance of ultrasonography for giant-cell arteritis. Annals of Internal Medicine 2005 vol:142 iss:5 pg:359 -369
Ultrasonography has been suggested as a useful, noninvasive diagnostic test for giant-cell arteritis. Studies focused on stenoses and occlusions using a continuous-wave Doppler ultrasound flow detector; however, the diagnostic performance varied. There is better resolution for vascular structures using color duplex ultrasonography; this combines real-time imaging and spectral Doppler flow-velocity determination, therefore permitting assessment of both vessel anatomy and luminal status.