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Fig. 1. —Diagram for time-resolved three-dimensional MR angiography. Rapid acquisitions of 7.5 sec (range, 7.0-7.6 sec) are repeated four or five times during single breath-hold. Imaging delay from initiation of contrast bolus was 5 sec. After patient breathed for 10 sec, another 2-4 acquisitions were performed to obtain venous phase images.