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Fig. 3D —59-year-old man with moderate to severe upper left leg
claudication. Unenhanced time-of-flight MR angiography (TOF MRA) fails to
adequately show vascular disease in left common iliac artery because of
artifacts caused by turbulent flow (arrow, D). High-grade
stenosis in left superficial femoral artery is underestimated on TOF MRA
(arrow, E).