Fig. 2

The Diffusion kurtosis Imaging parameter maps (ADC map, K map, and D map) of three patients with different eGFR levels. Patient 1, eGFR = 71.57. The D, K, and ADC map showed that the renal allograft parenchyma had evident signal. Patient 2, eGFR = 47.48. The D and ADC map showed multiple little patchy hypointensive signals in the renal allograft parenchuma, while the K map showed multiple little patchy hyperintensive signals. (as depicted by the arrows). Patient 3, eGFR = 21.49. The D and ADC map showed diffuse low signal intensity in the renal allograft parenchuma, while the K map showed diffuse high signal intensity. (as depicted by the arrows)