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Performance characteristics of a compact position-sensitive LSO detector module

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dc.affiliation.dptoUC3M. Departamento de Bioingenieríaes
dc.affiliation.grupoinvUC3M. Grupo de Investigación: BSEL - Laboratorio de Ciencia e Ingeniería Biomédicaes
dc.contributor.authorVaquero López, Juan José
dc.contributor.authorSeidel, Jürgen
dc.contributor.authorSiegel, Stefan
dc.contributor.authorGandler, William R.
dc.contributor.authorGreen, Michael V.
dc.date.accessioned2012-06-13T09:01:33Z
dc.date.available2012-06-13T09:01:33Z
dc.date.issued1998-12
dc.description.abstractWe 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.sponsorshipThe 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.description.statusPublicado
dc.format.mimetypeapplication/pdf
dc.identifier.bibliographicCitationIEEE Transactions on Medical Imaging, vol. 17, n. 6, dec. 1998. Pp. 967-978
dc.identifier.doi10.1109/42.746629
dc.identifier.issn0278-0062
dc.identifier.publicationfirstpage967
dc.identifier.publicationissuen. 6
dc.identifier.publicationlastpage978
dc.identifier.publicationtitleIEEE Transactions on Medical Imaging
dc.identifier.publicationvolumevol. 17
dc.identifier.urihttps://hdl.handle.net/10016/14551
dc.language.isoeng
dc.publisherIEEE
dc.relation.publisherversionhttp://dx.doi.org/10.1109/42.746629
dc.rights© IEEE
dc.rights.accessRightsopen access
dc.subject.ecienciaBiología y Biomedicina
dc.subject.otherIntercrystal scatter
dc.subject.otherLutetium oxyorthosilicate:Ce (LSO)
dc.subject.otherPosition-sensitive photomultiplier tubes
dc.subject.otherSmall animal positron emission tomography (PET)
dc.titlePerformance characteristics of a compact position-sensitive LSO detector module
dc.typeresearch article*
dc.type.hasVersionAO*
dspace.entity.typePublication
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