Role for contrast-enhanced ultrasound in assessing complications after kidney transplant

Figure 2 Transplant renal artery stenosis in a 30-year-old man with graft dysfunction, 1 year after cadaveric kidney transplantation. A: Color Doppler analysis of transplant renal artery (TRA) showed aliasing artifact and increased systolic pick velocity (300 cm/s); B-D: After the administration of an ultrasound contrast agent, there was better evidence of focal thinning of the TRA lumen (arrow in B), as evident on a magnified image (arrow in C) and subsequent digital subtraction angiography (arrow in D) performed for interventional purposes.