Table 3.

Diffusion parameters in groups of AKI stages.

Parameter		Healthy n = 14	No AKI n = 18	AKI n = 36	AKIN 1 n = 17	AKIN 2 n = 15	AKIN 3 n = 3
ADC ×10−3 mm2/s	Cortex	2.12 ± 0.04	2.05 ± 0.04	1.99 ± 0.03∗	1.97 ± 0.04∗	2.01 ± 0.05	1.99 ± 0.12
	Medulla	2.20 ± 0.03	2.18 ± 0.05	2.07 ± 0.02∗#	2.06 ± 0.04∗#	2.09 ± 0.04	2.06 ± 0.12
FA	Cortex	0.15 ± 0.01	0.14 ± 0.01	0.14 ± 0.004	0.14 ± 0.01	0.14 ± 0.01	0.12 ± 0.01
	Medulla	0.33 ± 0.02	0.28 ± 0.01∗∗	0.27 ± 0.01∗∗∗	0.27 ± 0.01∗∗	0.26 ± 0.01∗∗∗	0.27 ± 0.05∗
ADCd	Cortex	1.47 ± 0.04	1.44 ± 0.04	1.43 ± 0.02	1.41 ± 0.03	1.46 ± 0.03	1.40 ± 0.11
×10−3 mm2/s	Medulla	1.57 ± 0.05	1.50 ± 0.04	1.49 ± 0.02	1.49 ± 0.03	1.52 ± 0.03	1.38 ± 0.13
ADCp	Cortex	10.03 ± 0.44	9.89 ± 0.52	8.58 ± 0.26∗#	8.25 ± 0.35∗#	9.13 ± 0.43	8.09 ± 0.99
×10−3 mm2/s	Medulla	9.89 ± 0.36	10.22 ± 0.47	9.31 ± 0.25	8.92 ± 0.25#	9.78 ± 0.47	9.13 ± 1.26
Fp	Cortex	0.36 ± 0.02	0.34 ± 0.02	0.31 ± 0.01∗	0.30 ± 0.01∗	0.32 ± 0.01	0.32 ± 0.06
	Medulla	0.35 ± 0.02	0.36 ± 0.02	0.33 ± 0.01	0.33 ± 0.01	0.32 ± 0.01	0.36 ± 0.01

Significant differences compared to healthy volunteers (^∗P < .05, ^∗∗P < .01, ^∗∗∗P < .001) and patients without AKI (#P < .05) are indicated. No significant differences were found between groups of different AKI stages.

ADC = apparent diffusion coefficient, quantitative value of diffusion, ADCd = ADC diffusion, quantitative value of pure diffusion, ADCp = ADC perfusion, quantitative value of pseudodiffusion, AKI = acute kidney injury, AKIN 1-3 = AKI stage 1–3 according to the Acute Kidney Injury Network criteria corresponding to mild, moderate and severe AKI, FA = fractional anisotropy, quantitative value of diffusion anisotropy, Fp = perfusion fraction.