Positron emission tomography Essay Example | Topics and Well Written Essays - 2500 words

Positron emission tomography - Essay ExampleIsotopes with the tendency to radioactivity nurture to atoms with an unstable nucleus. The inner core, which consists of the nucleus, has unbalanced energy. The dense package of neutron and proton makes the nucleus unstable. The lack of stability is the basis for the guff process. Therefore, finished decomposition, the nuclei transform its configuration and components to a less strength and steady condition. This decomposition obeys the exponential law, which states the turn of events of decomposition per second is always equivalent to the amount of the un crumpleed nuclei available. The law is also applicable to the rate of decay (activity). The decay depends on the half-life of the nuclide. Half-life is the duration/time that a nucleus takes to be halved.Positrons discover to the subatomic molecules that are equal in mass to an electron with characteristic of carrying a positive charge. When the antielectron decay (+), its nuclei ch anges one of the core protons (p) to a neutron (n), while emitting positron (+) to attain a positively supercharged nature referred to as neutrino ().Upon the release from the initial nucleus, the high positron moves across a few millimeters through the tissue until it attains thermalization, during the acquisition of thermal energy, the positrons arrive at thermal energies. They begin connecting with electrons either through dissolution that produce two 511 keV photons to take anti-parallel positrons frame or through development of the hydrogen.