Accurate determination of the quantity of a chemical element, compound or functional group present in a specimen. Can be used to determine antibody concentrations or to determine the concentration of any substance against which specific antibodies can be produced. Determining where radioisotopes go in the body allows diagnosis of diseases that cannot be detected otherwise. Radioactive material helps outline size, shape and exact location of an organ, chamber or duct after isotope is injected into body. Paper strip with one or more areas impregnated with chemicals that undergo a color change when they react with specific substances.
Various chemicals reverse the process of blood clotting.
A film produced by exposure to X-rays. A rising titer may give important objective evidence toward establishing a precise diagnosis. Any agglutination test using red blood cells from sheep, such as the Rose-Waaler test. Combining techniques of spectrophotometry and fluorescence analysis. A special technique to show in detail images of structures lying in a plane of tissue.