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Fig. 1B 61-year-old man with arteriosclerotic obstructive disease and
pain in left lower leg. Three-dimensional anteroposterior fast low-angle shot
subtracted MR angiogram after power injection of 2.5 mL of gadodiamide diluted
in saline solution through sheath in superficial femoral artery (injection
rate, 2.5 mL/sec; total volume, 30 mL) reveals occlusion (grade 4) of
superficial femoral artery correctly detected by all four observers. Note
reconstitution of distal superficial femoral artery and popliteal artery by
small collateral vessels (arrow).