Fig. 1From: Arteriovenous fistulae after renal biopsy: diagnosis and outcomes using Doppler ultrasound assessmentColor Doppler ultrasound image of an AV fistula in a transplant kidney. The image is from a convexe transducer showing the upper pole. The fistula is evident as a coloured area < 1 cm from the renal capsule. Red, yellow, green and blue are seen within it, suggesting high velocity, disturbed flowBack to article page