Annotated images:
- aortomesenteric angle = 20° (normal: 28-65°)
- aortomesenteric distance = 8 mm (normal: 10-34 mm)
- the compression ratio of the anteroposterior diameter of the pre-compressed left renal vein (6.10 mm) divided by that of the compressed vein (2.23 mm): 6.10/2.23 = 2.73 (a compression ratio above 2.25 is highly sensitive and specific for nutcracker syndrome )