Initial characterization of a BGO-photodiode detector for high resolution positron emission tomography

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Spatial resolution in positron emission tomography is currently limited by the resolution of the detectors. This work presents the initial characterization of a detector design using small bismuth germanate (BGO) crystals individually coupled to silicon photodiodes (SPDs) for crystal identification, and coupled in groups to phototubes (PMTs) for coincidence timing. A 3 mm x 3 mm x 3 mm BGO crystal coupled only to an SPD can achieve a 511 keV photopeak resolution of 8.7% FWHM at -150/sup 0/C, using a pulse peaking time of 10 ..mu..s. When two 3 mm x 3 mm x 15 mm BGO crystals are ... continued below

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Pages: 9

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Derenzo, S.E. November 1, 1983.

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Description

Spatial resolution in positron emission tomography is currently limited by the resolution of the detectors. This work presents the initial characterization of a detector design using small bismuth germanate (BGO) crystals individually coupled to silicon photodiodes (SPDs) for crystal identification, and coupled in groups to phototubes (PMTs) for coincidence timing. A 3 mm x 3 mm x 3 mm BGO crystal coupled only to an SPD can achieve a 511 keV photopeak resolution of 8.7% FWHM at -150/sup 0/C, using a pulse peaking time of 10 ..mu..s. When two 3 mm x 3 mm x 15 mm BGO crystals are coupled individually to SPDs and also coupled to a common 14 mm diam PMT, the SPDs detect the 511 keV photopeak with a resolution of 30% FWHM at -76/sup 0/C. In coincidence with an opposing 3 mm wide BGO crystal, the SPDs are able to identify the crystal of interaction with good signal-to-noise ratio, and the detector pair resolution is 2 mm FWHM. 32 references, 7 figures, 3 tables.

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Pages: 9

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NTIS, PC A02/MF A01.

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  • Nuclear science symposium, San Francisco, CA, USA, 19 Oct 1983

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  • Other: DE84006750
  • Report No.: LBL-16952
  • Report No.: CONF-831015-35
  • Grant Number: AC03-76SF00098
  • Office of Scientific & Technical Information Report Number: 5273042
  • Archival Resource Key: ark:/67531/metadc1067184

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • November 1, 1983

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  • Feb. 4, 2018, 10:51 a.m.

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  • April 25, 2018, 4:13 p.m.

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Derenzo, S.E. Initial characterization of a BGO-photodiode detector for high resolution positron emission tomography, article, November 1, 1983; [Berkeley,] California. (digital.library.unt.edu/ark:/67531/metadc1067184/: accessed May 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.