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Angiology
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Variability in Arteriographic Assessment of the Carotid Bifurcation

Mark Fisher, M.D.

Department of Neurology, University of Southern California School of Medicine, Los Angeles, California

Jamshid Ahmadi, M.D.

Department of Radiology, University of Southern California School of Medicine, Los Angeles, California

Chi-Shing Zee, M.D.

Department of Radiology, University of Southern California School of Medicine, Los Angeles, California

John M. Weiner, P.H.

Department of Medicine, University of Southern California School of Medicine, Los Angeles, California

We evaluated interobserver and intraobserver variability in the arteriographic assessment of the carotid bifurcation. Two neuroradiologists evaluated area stenosis and lumen surface morphology for 60 biplane carotid arteriograms in two reading sessions. Absolute interobserver differences for area stenosis averaged 8.8%, and interobserver differences were statistically significant for arteries of at least 50% stenosis. Analysis of observations for lumen surface morphology revealed statistically significant interobserver differences, averaging 29.5% disagreement. Intraobserver differences were not statistically significant. Observer variability for arteriography should be considered in the process of evaluating patients for carotid endarterectomy.

Angiology, Vol. 38, No. 2, 116-120 (1987)
DOI: 10.1177/000331978703800204
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