isotope clearance

i·so·tope clear·ance

the rate at which an isotope is removed (usually by blood flow) from a tissue or organ such as the brain.
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References in periodicals archive ?
This study compared serum analytes with the results of nuclear isotope clearances because only these clearance data guarantee an exact comparative basis.
Because it is impossible to measure nuclear isotope clearances in children without suspicious pathology, we defined children with nonpathologic GFR values (>90 mL x [min.sup.-1] x 1.73 [m.sup.-2]) as the control group.