Figure 4. Axial apparent diffusion coefficient (ADC) maps from diffusion weighted MR images at the level of the kidneys. Pretreatment ADC values in left kidney was 1.065 x10-3 mm/sec2 and post-treatment ADC values increased to 2.024 x10-3 mm/sec2 (90.0% increase) which is compatible with favorable response to steroid treatment.