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Fig. 1C. —Blood flow volume measurement of internal carotid artery by different techniques in 58-year-old man who recently had minor stroke. MR phase-contrast flow quantification on high-resolution nontriggered two-dimensional phase-contrast axial images (TR/TE, 30/9.7; flip angle, 150°) shows same internal carotid artery (A) with flow data display. Image was at plane perpendicular to left internal carotid artery on MR angiography. Left upper image is magnitude image on which region of interest (ROI) at left internal carotid artery was drawn. Right upper image is phase image on which ROI drawn at left internal carotid artery on magnitude image was transposed. Respective flow information (3.49 mL/sec) was displayed on lower table corresponding to 209.4 mL/min.