Fig. 3From: Estimation of renal perfusion based on measurement of rubidium-82 clearance by PET/CT scanning in healthy subjectsOne-tissue compartment model used for estimation of RBF. K1 is the rate constant for 82Rb uptake in the kidneys from the vascular space, whereas k2 is the rate constant for release of 82Rb back into the blood. No discernible tracer activity was observed via urinary excretion [21]Back to article page