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Figure 1b. (a) Coronal volume-rendered multi-detector row CT angiogram shows the renal arteries. Note the two right renal arteries (arrowheads), with the lower-pole segmental artery (a common variant) arising directly from the inferior aorta. Long arrow = left renal artery, short arrow = left renal vein. (b) Coronal volume-rendered image shows the renal arteries (arrowheads), left renal vein (short arrow), and left gonadal vein (long arrow). (c) Coronal volume-rendered multi-detector row CT angiogram, obtained with slab editing to remove foreground and background tissues, shows an early-branching left renal vein (arrow) anterior to the renal artery (arrowhead).
