Competitive
Radioimmunoassay (RIA)
uses the
competitive binding technique
uses
radioisotopes as labels
amount of
labeled reactant left in system is measured using a
radiation
detector:
]liquid
scintillation counter:
]solid crystal
gamma counter:
" and $ rays
( rays
amount of
labeled reactant left in system is inversely
proportional to
amount of antigen in patient sample
