. Author manuscript; available in PMC: 2022 Dec 26.

Published in final edited form as: Invest Radiol. 2019 Nov;54(11):681–688. doi: 10.1097/RLI.0000000000000588

Table 1.

Renal changes during acute renal ischemia and recovery by multi-parametric MRI

	Baseline	50% RAS	75% RAS	100% RAS	Recovery
Perfusion (mL/mL/min)
Cortex	2.19±0.63	0.67±0.47^*	0.45±0.19^*	0.38±0.13^*	0.83±0.43^*^&
Medulla	1.26±0.32	0.34±0.35^*	0.21±0.05^*	0.17±0.03^*	0.74±0.39^*^#$&
R₂* (s⁻¹)
Cortex	17.8±1.8	31.2±9.4^*	50.6±13.6^*^#	57.1±18.1^*^#	19.5±6.9^#$&
Medulla	20.2±2.5	41.8±13.4^*	64.1±13.3^*^#	67.2±13.5^*^#	19.1±3.7^#$&
Stiffness (kPa)
Cortex	4.76±0.49	3.72±0.34^*	3.79±0.47^*	3.66±0.57^*	6.19±1.46^#$&
Medulla	4.54±0.53	3.59±0.20^*	3.46±0.39^*	3.40±0.42^*	5.31±0.97^#$&
ADC (×10⁻³mm²/s)
Cortex	1.54±0.21	0.94±0.22^*	0.87±0.18^*	0.82±0.19^*	1.41±0.07^#$&
Medulla	1.51±0.23	0.99±0.19^*	0.94±0.16^*	0.95±0.15^*	1.51±0.16^#$&
MTR at 600 Hz
Cortex	0.81±0.03	0.81±0.05	0.80±0.04	0.79±0.04	0.77±0.03^*^#
Medulla	0.75±0.04	0.76±0.05	0.77±0.04	0.75±0.03	0.73±0.05
MTR at 1000 Hz
Cortex	0.76±0.03	0.78±0.06	0.76±0.04	0.74±0.04	0.64±0.05^*^#
Medulla	0.67±0.03	0.71±0.05	0.71±0.02	0.69±0.04	0.73±0.05

Data are means ± standard deviations. MRI=magnetic resonance imaging; RAS=renal artery stenosis; ADC=apparent diffusion coefficient; MTR=magnetization transfer ratio.

P<0.05 vs. Baseline

P<0.05 vs. 50% RAS

P<0.05 vs. 75% RAS

P<0.05 vs. 100% RAS.