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A Study of Intrinsic Crystal-pixel Light-output Spread for Discrete Scintillation Gamma-rays Imagers Modeling

TitoloA Study of Intrinsic Crystal-pixel Light-output Spread for Discrete Scintillation Gamma-rays Imagers Modeling
Tipo di pubblicazionePresentazione a Congresso
Anno di Pubblicazione2002
AutoriScafè, R., Pellegrini R., Soluri A., Tatì Angelo, Cinti M.N., Cusanno F., Trotta G., Pani R., and Garibaldi F.
Conference NameIEEE Nuclear Science Symposium and Medical Imaging Conference
Parole chiaveComputerized tomography, Crystal arrays, Gamma rays, Image sensors, Parameter estimation, Photomultipliers, Scintillation
Abstract

This paper is focused on discrete scintillation imaging devices, made by using crystal arrays and metal-channel dynode Hamamatsu 1" and 2" square Position Sensitive PhotoMultiplier Tubes (PSPMT). These devices are particularly suitable for nuclear medicine based high-resolution Single Photon Emission Computed Tomography (SPECT) applications. A more adequate analytical model describing the light-output spread from a single crystal-pixel, was studied. Previously experimental data published by us were reviewed using this model. The parameter which describes the intrinsic pixel light-output spread was obtained using an 1-D model-version, that adequately fits the measured single-event charge-strip integrals. Furthermore the intrinsic spread was found linearly dependent, in the examined experiments, on a crystal-pixel shape factor (defined as the ratio between the pixel-blind-surface-area to the pixel-volume). Finally, a simulation tool was developed on these basis, to predict and to optimize the imager response by evaluating the impact of each device component on the response.

URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-0142148006&partnerID=40&md5=19921e472f77a292461d47d33f0ea7f7
Citation KeyScafè20021652