Performance characteristics of a compact position-sensitive LSO detector module

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Show simple item record Vaquero López, Juan José Seidel, Jürgen Siegel, Stefan Gandler, William R. Green, Michael V. 2012-06-13T09:01:33Z 2012-06-13T09:01:33Z 1998-12
dc.identifier.bibliographicCitation IEEE Transactions on Medical Imaging, vol. 17, n. 6, dec. 1998. Pp. 967-978
dc.identifier.issn 0278-0062
dc.description.abstract We assembled a compact detector module comprised of an array of small, individual crystals of lutetium oxyorthosilicate: Ce (LSO) coupled directly to a miniature, metal-can, position-sensitive photomultiplier tube (PSPMT).We exposed this module to sources of 511-keV annihilation radiation and beams of 30- and 140-keV photons and measured spatial linearity; spatial variations in module gain, energy resolution, and event positioning; coincidence timing; the accuracy and sensitivity of identifying the crystal-of-first-interaction at 511 keV; and the effects of intercrystal scatter and LSO background radioactivity. The results suggest that this scintillator/phototube combination should be highly effective in the coincidence mode and can be used, with some limitations, to image relatively low-energy single photon emitters. Photons that are completely absorbed on their first interaction at 511 keV are positioned by the module at the center of a crystal. Intercrystal scatter events, even those that lead to total absorption of the incident photon, are placed by the module in a regular “connect-the-dot” pattern that joins crystal centers. As a result, the accuracy of event positioning can be made to exceed 90%, though at significantly reduced sensitivity, by retaining only events that occur within small regions-of-interest around each crystal center and rejecting events that occur outside these regions in the connect-the-dot pattern.
dc.description.sponsorship The work was supported in part by a grant from CICYT (Spanish Government). The work of S. Siegel was supported by a grant from the National Research Council.
dc.format.mimetype application/pdf
dc.language.iso eng
dc.publisher IEEE
dc.rights © IEEE
dc.subject.other Intercrystal scatter
dc.subject.other Lutetium oxyorthosilicate:Ce (LSO)
dc.subject.other Position-sensitive photomultiplier tubes
dc.subject.other Small animal positron emission tomography (PET)
dc.title Performance characteristics of a compact position-sensitive LSO detector module
dc.type article
dc.description.status Publicado
dc.subject.eciencia Biología y Biomedicina
dc.identifier.doi 10.1109/42.746629
dc.rights.accessRights openAccess
dc.type.version draft
dc.identifier.publicationfirstpage 967
dc.identifier.publicationissue n. 6
dc.identifier.publicationlastpage 978
dc.identifier.publicationtitle IEEE Transactions on Medical Imaging
dc.identifier.publicationvolume vol. 17
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