radioimmunosorbent test
(RIST) a highly sensitive radioimmunoassay for measuring the total IgE antibody concentration in serum; the serum sample is reacted with radiolabeled IgE and anti–human IgE antibody coupled to an insoluble support. The amount of labeled IgE remaining bound to the immunosorbent varies inversely with the amount of (unlabeled) IgE present in the sample.
Medical dictionary.
2011.