Comparison of resistive index and shear-wave elastography in the evaluation of chronic kidney allograft dysfunction

Figure 1 Shear wave elastography results from a case of stable graft function and with chronic kidney allograft dysfunction. A: Shear wave elastography of the kidney graft parenchyma. Tissue elasticity is determined within the selected one region of interest and visually displayed as blue color; B: Shear wave elastography of the kidney graft parenchyma in this case is showing red colour which denotes increased tissue stiffness of the parenchyma; C: Quantitative report in kPa. The mean of the elasticity is 4.9 kPa, which is within the normal range; D: The quantitative value in kPa in this case is 40.3 kPa, which is clearly increased.

Figure 2 Histopathology results from allograft biopsies. A: In this case, there is early deposition of blue collagen in between the tubules, which are showing only mild atrophy. One glomerulus included is intact (Trichrome stain, × 200); B: In this example, there is moderate amount of fibrous tissue in the graft parenchyma and moderate tubular atrophy. One glomerulus included is intact (Trichrome stain, × 200); C: In this case, there is severe tubular atrophy associated with severe interstitial fibrosis. The included glomerulus is globally sclerosed (Trichrome stain, × 200).