title: Measurement of radial immunodiffusion plates with a scanning densitometer.
abstract: Measurement of the diameters of the precipitation rings in radial immunodiffusion plates with a scanning densitometer is described. Data obtained by scanning were compared with a conventional visual method of measurement and although the differences were statistically significant, the differences were small and there was no basis for determining which method was a more accurate estimation of concentration. It was concluded that the scanning method, which uses equipment present in most clinical pathology laboratories, is an acceptable alternative method for measuring radial immunodiffusion.
mesh_terms: D003720:Densitometry / Q000295:instrumentation; D005779:Immunodiffusion / Q000295:instrumentation*; D007136:Immunoglobulins; D011233:Precipitin Tests; D013997:Time Factors
chemical_list: D007136:Immunoglobulins