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A study of intrinsic crystal-pixel light-output spread for discrete scintigraphic imagers modeling

TitleA study of intrinsic crystal-pixel light-output spread for discrete scintigraphic imagers modeling
Publication TypeArticolo su Rivista peer-reviewed
Year of Publication2004
AuthorsScafè, R., Pellegrini R., Soluri A., Montani L., Tatì Angelo, Cinti M.N., Cusanno F., Trotta G., Pani R., and Garibaldi F.
JournalIEEE Transactions on Nuclear Science
KeywordsArrays, Computerized tomography, Crystal structure, High resolution, Image sensors, Mathematical models, Medical imaging, Nuclear medicine, Phosphors, Photomultipliers, Position sensitive photomultiplier tube, Scintillation array, Scintillation imagers, Spatial light distribution, Statistical methods

{This paper is focused on the discrete scintillation imaging devices, consisting of crystal arrays and metal-channel dynode Hamamatsu 1″ and 2″ square position sensitive photomultiplier tubes (PSPMTs). These devices are suitable for nuclear medicine based high resolution applications, and, particularly, for single photon emission computed tomography (SPECT). The model of scintillation light distribution (SLD) previously developed was able to distinguish the responses from crystal-pixels with different side, but it was not detailed enough to explain the influence of crystal-thickness. For this reason the experimental data were reviewed to find a new and more adequate analytical model. The improved SLD model explains the influence both of crystal-side and crystal-thickness on the scintillation light-output spread. The SLD expression is quite simple and its spread depends only on one q-parameter. This expression is well adaptable over the range of examined crystal arrays. Furthermore, in the considered experiments, the SLD q-parameter was found linearly dependent on crystal-pixel shape factor S/V(S = blind-surfacearea


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Citation KeyScafè200480