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Fig. 2. —62-year-old man with 10-year history of diabetes. Axial multiphase gradient-echo image at level of lower thigh after administration of 2-ml contrast test bolus shows regions of interest (A and B) that are placed over superficial femoral artery bilaterally to obtain signal-intensity curve for both sides. Half time to maximum signal intensity is determined in both legs. Delayed value is used as scan delay. Display is immediately available on operating console.