Fig. 2

Contrast-enhanced computed tomography of the abdomen and renal artery Doppler ultrasound. a contrast-enhanced computed tomography of one-and-a-half-year-old girl: the abdomen image shows normal renal arterial (white arrow); b Renal artery Doppler ultrasound: the internal diameter for the right renal artery was 2.2 mm at the beginning, the maximum forward blood flow velocity was 89.3 cm/s (in normal range: 69.61 ± 17.77 cm/s); the internal diameter for the left renal artery was 2.5 mm at the beginning, the maximum forward blood flow velocity was 82.2 cm/s (in normal range: 69.61 ± 17.77 cm/s)