Positron
61positron — pos•i•tron [[t]ˈpɒz ɪˌtrɒn[/t]] n. phs an elementary particle with the same mass as an electron but a positive charge; the antiparticle of the electron • Etymology: 1930–35; posi (tive) + (elec) tron …
62positron — /ˈpɒzətrɒn / (say pozuhtron) noun an elementary particle with positive charge and mass equal to that of the electron; the antiparticle corresponding to the electron. {posit(ive) + (elect)ron} –positronic, adjective …
63positron — n. positively charged atomic particle of same mass as electron, emitted by transuranic elements and found in cosmic rays …
64positron — s ( en, er) FYSIK …
65Positron — Po|si|t|ron , das; s, ...onen <lateinisch; griechisch> (Kernphysik positiv geladenes Elementarteilchen) …
66positron — n. Physics an elementary particle with a positive charge equal to the negative charge of an electron and having the same mass as an electron. Etymology: POSITIVE + TRON …
67positron-emission tomography — noun Date: 1976 tomography in which a cross sectional image of regional metabolism is obtained by a usually color coded representation of the distribution of gamma radiation given off in the collision of electrons in cells with positrons emitted… …
68positron emission tomography (PET) — Imaging technique used in diagnosis and biomedical research. A chemical compound labeled with a radioactive isotope (see radioactivity) that emits positrons is injected into the body, and detectors measure their activity in the tissues as they… …
69positron emission tomography — noun A medical imaging technique which detects the gamma rays produced by positrons emitted from injected radionuclides …
70Positron Emission Tomography (PET) — A tool used to diagnose brain functions and disorders. PET produces three dimensional, colored images of chemicals or substances functioning within the body. These images are called PET scans …
