Radioisotopes carbon 14 dating pathway
However, the main radioisotopes such as Tc-99m cannot effectively be produced without reactors.* Radioisotopes are an essential part of medical diagnostic procedures.
In combination with imaging devices which register the gamma rays emitted from within, they can study the dynamic processes taking place in various parts of the body.
In most cases, the information is used by physicians to make a quick diagnosis of the patient's illness.
The thyroid, bones, heart, liver, and many other organs can be easily imaged, and disorders in their function revealed.
In developed countries (a quarter of the world population) about one person in 50 uses diagnostic nuclear medicine each year, and the frequency of therapy with radioisotopes is about one-tenth of this.
Nuclear medicine uses radiation to provide information about the functioning of a person's specific organs, or to treat disease.
Every organ in our bodies acts differently from a chemical point of view.A positron-emitting radionuclide is introduced, usually by injection, and accumulates in the target tissue.As it decays it emits a positron, which promptly combines with a nearby electron resulting in the simultaneous emission of two identifiable gamma rays in opposite directions.If a series of images is taken over a period of time, an unusual pattern or rate of isotope movement could indicate malfunction in the organ.
A distinct advantage of nuclear imaging over X-ray techniques is that both bone and soft tissue can be imaged very successfully.
These are detected by a PET camera and give very precise indications of their origin.