Scintillation crystal readout by multi-APD for event localization

TitleScintillation crystal readout by multi-APD for event localization
Publication TypeArticolo su Rivista peer-reviewed
Year of Publication2006
AuthorsScafè, R., Montani L., Iurlaro G., Alonge G., Fasolino T., De Vito S., and Della Sala Dario
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
KeywordsCrystal face, Energy response, Medical imaging, Optical resolving power, Photodiodes, Radioisotopes, Radionuclide imaging, Scintillation counters, Silicon avalanche photodiode

This work is aimed to assess the feasibility of a gamma-ray scintillation detector for radionuclide imaging characterized by good energy resolution and point-of-interaction measurement at room temperature. To obtain such performances the single-event scintillation light must be read from more than one crystal face. We have preliminarily analyzed the energy response using CsI:Tl crystals and Si-APD. Results concerning energy response are presented in terms of linearity and resolution. The single-APD configuration, chosen as a reference, has shown very good energy linearity in the range 80-662 keV and a 7.6% FWHM energy resolution at 662 keV. Similar linearity results have been obtained for the 5-APD case, while energy resolution worsens down to 13.2% FWHM. These results could be further improved using APD with reduced peripheral dead zones. © 2006 Elsevier B.V. All rights reserved.


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