1. Gray-scale and Doppler sonography: acute rejection in a renal transplant. Upper left: Gray-scale ultrasound image of transplant kidney shows poor corticomedullary differentiation. A small fluid collection is seen within the renal pelvis (arrow). Native external iliac vessels are seen as tubular hypoechoic structures (arrowheads). Upper right and lower left: Color Doppler images demonstrate flow within the native external iliac artery (arrowheads), the transplant renal artery (long arrow), and the interlobar arteries (short arrow). Lower right: Spectral Doppler analysis reveals an elevated resistive index of These findings are compatible with, but not specific for, acute rejection. In the nonacute setting, cyclosporin toxicity or chronic rejection may also show elevated arterial resistive indices.
Source: Chapter 6. Radiology of the Urinary Tract, Smith & Tanagho's General Urology, 18e
Citation: McAninch JW, Lue TF. Smith & Tanagho's General Urology, 18e; 2013 Available at: Accessed: January 10, 2018
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