Apparent diffusion coefficient of kidneys with non-contrast magnetic resonance angiography for functional and anatomical assessment in renal artery stenosis

Figure 4 Hypertensive patient. A: T2W magnetic resonance (MR) image (coronal plane) showing bilateral normal-sized kidneys (RK 8.9 cm, LK 8.9 cm); B: Non-contrast MR angiography (INHANCE) depicting bilateral normal renal arteries in the axial plane; C-H: Diffusion-weighted MR image (C, E, G) in the axial plane with corresponding apparent diffusion coefficient (ADC) map (D, F, H) of bilateral kidneys showing manually drawn region-of-interest (ROI) placed in the upper (C, D), middle (E, F) and lower (G, H) pole regions of bilateral kidneys. The ROI is placed in the cortex and medulla on both sides. Mean cortical ADC and medullary ADC values of the right kidney were 191 × 10^-3 mm²/s and 1.86 × 10^-3 mm²/s. Mean cortical ADC and medullary ADC values of the left kidney were 189 × 10^-3 mm²/s and 1.82 × 10^-3 mm²/s, respectively.