Figure 1:

The kidneys, inferior vena cava (IVC), and aorta are presented in standard radiologic coordinates. Blood flow rates (Q) and venous oxygen saturation levels (SvO₂) are defined in the aorta (A) and IVC (V) at suprarenal (s) and infrarenal (i) locations, marked in dashed lines. Quantification of bilateral renal metabolic rate oxygen (rMRO₂) follows from enforcing conservation of mass and flow. In the present study, the simplified equation was selected for quantification of bilateral rMRO₂. The slice prescription locations are marked as suprarenal IVC (s), infrarenal IVC (i), left renal vein (L), and right renal vein (R). Figure is not to scale.