The use of position sensitive photomultiplier tubes (PSPMT) in Nuclear Medicine imaging has recently produced some major steps forward in this field. In fact a dedicated camera for the organ under examination can improve imaging performances. However, in order to maximize them, scintillating crystals arrays have to be employed. In this work 13 Csl(Tl). Csl(Na). Nal(Tl). YAP(Ce) arrays were tested, Square pixel active area ranged between I x I and 2 x 2 mm (2) and thickness from I to 10 mm. Light output and energy resolution responses versus photon energy and pixel thickness were measured using a standard bialkali PMT. Scintillation light spatial distribution were analyzed coupling Csl(Tl) arrays to a recently available multianode 16 channel linear array PMT. Light output study shown that Csl(Tl) is the best considered material, optimizing optical, mechanical requirements and costs. Light output as well as energy resolution resulted independent on pixel area, but strongly dependent on thickness. Csl(Tl), 1 mm turn thick, gave the best energy resolution values (13-14% FWHM, at 122 keV). The light output aperture angle as well as spatial resolution values resulted roughly independent on crystal geometry. The light spread resulted slightly affected by crystal pixel size. Measurements allow to foresee imaging performances of many PSPMTs coupled to the investigated arrays and give a good set of data for simulations comparison. (C) 2002 Elsevier Science B.V. All rights reserved.

Scintillation arrays characterization for photon emission imaging / Pani, Roberto; R., Scafe; Pellegrini, Rosanna; A., Soluri; G., Trotta; L., Indovina; Cinti, Maria Nerina; DE VINCENTIS, Giuseppe. - In: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT. - ISSN 0168-9002. - STAMPA. - 477:1-3(2002), pp. 72-76. (Intervento presentato al convegno 5th International Conference on Position-Sensitive Detectors tenutosi a LONDON, ENGLAND nel SEP 13-17, 1999) [10.1016/s0168-9002(01)01912-x].

Scintillation arrays characterization for photon emission imaging

PANI, Roberto;PELLEGRINI, Rosanna;CINTI, Maria Nerina;DE VINCENTIS, Giuseppe
2002

Abstract

The use of position sensitive photomultiplier tubes (PSPMT) in Nuclear Medicine imaging has recently produced some major steps forward in this field. In fact a dedicated camera for the organ under examination can improve imaging performances. However, in order to maximize them, scintillating crystals arrays have to be employed. In this work 13 Csl(Tl). Csl(Na). Nal(Tl). YAP(Ce) arrays were tested, Square pixel active area ranged between I x I and 2 x 2 mm (2) and thickness from I to 10 mm. Light output and energy resolution responses versus photon energy and pixel thickness were measured using a standard bialkali PMT. Scintillation light spatial distribution were analyzed coupling Csl(Tl) arrays to a recently available multianode 16 channel linear array PMT. Light output study shown that Csl(Tl) is the best considered material, optimizing optical, mechanical requirements and costs. Light output as well as energy resolution resulted independent on pixel area, but strongly dependent on thickness. Csl(Tl), 1 mm turn thick, gave the best energy resolution values (13-14% FWHM, at 122 keV). The light output aperture angle as well as spatial resolution values resulted roughly independent on crystal geometry. The light spread resulted slightly affected by crystal pixel size. Measurements allow to foresee imaging performances of many PSPMTs coupled to the investigated arrays and give a good set of data for simulations comparison. (C) 2002 Elsevier Science B.V. All rights reserved.
2002
gamma detector; medical and biological imaging; mutli-channel photomultiplier (mc-pmt); position-sensitive photomultiplier (ps-pmt); position-sensitive photomultiplier (ps-pmt) gamma detectors; scintillator
01 Pubblicazione su rivista::01a Articolo in rivista
Scintillation arrays characterization for photon emission imaging / Pani, Roberto; R., Scafe; Pellegrini, Rosanna; A., Soluri; G., Trotta; L., Indovina; Cinti, Maria Nerina; DE VINCENTIS, Giuseppe. - In: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT. - ISSN 0168-9002. - STAMPA. - 477:1-3(2002), pp. 72-76. (Intervento presentato al convegno 5th International Conference on Position-Sensitive Detectors tenutosi a LONDON, ENGLAND nel SEP 13-17, 1999) [10.1016/s0168-9002(01)01912-x].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/358226
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