Fig. 7
From: The role of ultrasound imaging in vascular compression syndromes
B-Mode US: longitudinal sub-xiphoid scan of the abdominal aorta performed in supine decubitus. a Measurement of the aorto-mesenteric angle "A" in patient with NCS. Abdominal aorta (short arrow). Superior mesenteric artery (long arrow). b Duplex Doppler US shows a peak speed reduction in left renal vein. c Measurement of the left renal vein diameter. d Power Doppler US shows varicosity of the gonadal plexus (vein diameter 5.5 mm)