Broadly, all the assay technologies via immune reactions by antigen and antibody which tagged by radioactive isotopes can be called RIA 广义来说,凡是应用放射性同位素标记的抗原或抗体,通 过免疫反应测定的技术,都可称为放射免疫技术。 So far has development to the fifth generation of RIA technology. It is characterised by the combination of magnetic particles and ria or IRMA (immunoradiometric assayBroadly, all the assay technologies via immune reactions by antigen and antibody which tagged by radioactive isotopes can be called RIA 广义来说，凡是应用放射性同位素标记的抗原或抗体，通 过免疫反应测定的技术，都可称为放射免疫技术。 So far has development to the fifth generation of RIA technology. It is characterised by the combination of magnetic particles and RIA or IRMA (immunoradiometric assay)