- Scintillography
Scintillography is an
imaging method ofnuclear event s provoked bycollision s orcharged current interaction s among nuclear particles orionizing radiation andatom s which result in a brief, localised pulse ofelectromagnetic radiation , usually in thevisible light range (Cherenkov radiation ). This pulse (scintillation) is usually detected and amplified by aphotomultiplier orcharged coupled device elements (scintillator s), and its resulting electrical waveform is processed bycomputer s to provide two- and three-dimensional images of a subject orregion of interest .Scintillography is mainly used in
scintillation camera s inexperimental physics . For example, hugeneutrino detection underground tanks filled withtetrachloroethylene are surrounded by arrays of photo detectors in order to capture the extremely rare event of a collision between the fluid's atoms and aneutrino .Another extensive use of scintillography is in
medical imaging techniques which usegamma ray detectors calledgamma camera s. Detectors coated with materials which scintillate when subjected to gamma rays are scanned with optical photon detectors andscintillation counter s. The subjects are injected with specialradionuclide s which irradiate in the gamma range inside the region of interest, such as theheart or thebrain . A special type of gamma camera is theSPECT (Single Photon Emission Computed Tomography). Another medical scintillography technique, thePositron-emission tomography (PET), which uses the scintillations provoked byelectron-positron annihilation phenomena.
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