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Fig. 4D —Innominate steal in 56-year-old woman with Takayasu's arteritis and occluded innominate artery. Spectral Doppler images show reversed flow in all three portions of right carotid system (CCA, external carotid artery [ECA], and internal carotid artery [ICA]). Note low-resistance flow pattern in ECA and minimal diastolic flow in ICA.