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. 2014 Jun;35(6):1132–1136. doi: 10.3174/ajnr.A3838

Fig 1.

Fig 1.

Anteroposterior view of quantitative brain DSA of a 51-year-old woman. The midpoint of the cervical portion of the internal carotid artery was selected for the arterial region of interest. The midpoint of the ipsilateral internal jugular vein was selected for venous region of interest. Cerebral circulation time was the time difference between the 2 ROIs.