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Fig. 2 Anterior reference image from intraarterial MR aortogram
obtained with standard technique shows regions of interest selected for data
analysis. 1 = right renal artery, 2 = left renal artery, 3 = aorta, 4 = right
common iliac artery, 5 = left common iliac artery, 6 = gluteal muscle, 7 = air
outside body.