Scintillation (deexcitation) time of CsI(Tl) after gamma excitation

Belyavskii, Ya.D.; Гулаков, И. Р.; Pertsev, A.N.

doi:10.1007/bf00606770

Cited by 1 publication

(1 citation statement)

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“…Excitons eventually find their way to luminescent (dopant) centers where they can re-combine via radiative transitions with energies lower than the bandgap, emitting light in the process that, importantly, is at a wavelength that is not reabsorbed by the crystal. In many scintillators this recombination can proceed through different intermediate excited states, leading these scintillators to exhibit ‘fast’ and ‘slow’ components in their light emissions (Belyavskii et al ., 1971) . The light output of a scintillator, given in terms of the number of optical photons produced per keV of energy deposited (photons/keV), ultimately governs both the energy and spatial resolutions that can be achieved.…”

Section: Advances In Scintillatorsmentioning

confidence: 99%

SPECT detectors: the Anger Camera and beyond

2011

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The development of radiation detectors capable of delivering spatial information about gamma-ray interactions was one of the key enabling technologies for nuclear medicine imaging and, eventually, single-photon emission computed tomography (SPECT). The continuous NaI(Tl) scintillator crystal coupled to an array of photomultiplier tubes, almost universally referred to as the Anger Camera after its inventor, has long been the dominant SPECT detector system. Nevertheless, many alternative materials and configurations have been investigated over the years. Technological advances as well as the emerging importance of specialized applications, such as cardiac and preclinical imaging, have spurred innovation such that alternatives to the Anger Camera are now part of commercial imaging systems. Increased computing power has made it practical to apply advanced signal processing and estimation schemes to make better use of the information contained in the detector signals. In this review we discuss the key performance properties of SPECT detectors and survey developments in both scintillator and semiconductor detectors and their readouts with an eye toward some of the practical issues at least in part responsible for the continuing prevalence of the Anger Camera in the clinic.

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Section: Advances In Scintillatorsmentioning

confidence: 99%