Imaging technique that relies on the detection of gamma rays emitted from tissues after administration of a natural biochemical substance into which positron-emitting isotopes have been incorporated. Any of a variety of medical imaging methods that rely on atomic isotopes that decay and emit radiation. A monitoring method that employs a surrogate indicator for a public health problem, allowing estimation of the magnitude of the problem in the general population. An imaging technique that measures the emission of photons of a given energy from radioactive tracers introduced into the body. It is considered to be an autoimmune disease.
T cells play a cardinal role in regulating the immune system.
The concentration of a substance in a solution, or the strength of such a substance detected by titration. In the current context, the term is most likely to refer to antibody titer, which is a measure of the concentration of specific antibodies to selected microbes that are circulating in an individual's bloodstream. A group of organic micronutrients, present in minute quantities in natural foodstuffs, that are essential to normal metabolism.