NDLI: Designing the scintillation module of a pixelated mini gamma camera: The spatial spreading behaviour of light

Content Provider	IEEE Xplore Digital Library
Author	Netter, E. Pinot, L. Menard, L. Duval, M.A. Janvier, B. Lefebvre, F. Siebert, R. Charon, Y.
Copyright Year	2009
Description	Author affiliation: IMNC - UMR 8165 CNRS IN2P3 - Univ. Paris 7 Diderot and Paris 11 Sud, 15 rue Georges Clémenceau, 91406 Orsay Cedex, France (Netter, E.; Pinot, L.; Menard, L.; Duval, M.A.; Janvier, B.; Lefebvre, F.; Siebert, R.; Charon, Y.)
Abstract	Designing the scintillation module of a mini gamma camera requests good understanding of how the scintillation light signal spreads within the crystal and how photons are finally collected on the PMT. For a given scintillation process, the key parameters are the geometry of the crystal, its optical coating and the interface between the crystal and the PMT. In order to optimize the design of our gamma camera TReCam, we studied the shape of the spatial distribution of the scintillation light for different values and combinations of these key parameters. Our approach was to produce computer simulations, for which the optical simulation transport software DETECT2000 was used. Three major parameters were investigated: optical coatings for the crystal (aluminum, Teflon, corner cube retro-reflectors), the thickness of the crystal (ranging from 1 mm up to 5 mm) and the interfaces (air, optical grease). In addition to the FWHM of the light spot distribution, specific figures of merit were implemented to further characterize photon spreading. In order to evaluate the influence of these parameters on the imaging performances of the TReCam, the whole scintillation module (including the PMT) was also simulated with GATE v4.0.0 based on GEANT 4.9.1.p02. It appears that the best configuration is a 5 mm thick LaBr:Ce crystal plate covered on the top with Teflon optical coating coupled optically with a PMT.
Starting Page	3300
Ending Page	3302
File Size	154853
Page Count	3
File Format	PDF
ISBN	9781424439614
ISSN	10957863
DOI	10.1109/NSSMIC.2009.5401736
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-10-24
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Cameras Photonic crystals Coatings Computer simulation Signal design Geometrical optics Design optimization Shape Computational modeling Solid scintillation detectors
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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