A comparison of BGO, GSO, MLS, LGSO, LYSO and LSO scintillation materials for high-spatial-resolution animal PET detectors

Rocio A. Ramirez, Wai-Hoi Wong, Soonseok Kim, Hossain Baghaei, Hongdi Li, Yu Wang, Yuxuan Zhang, Shitao Liu, Jiguo Liu, Shuping Xie, Yaqiang Liu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

7 Scopus citations

Abstract

We are developing very-high resolution detector blocks for animal PET applications. We studied different scintillating crystals materials, BGO, GSO, LSO, MLS, LGSO, and LYSO, to determine the most suitable material for a low cost and high-resolution detector. In this study, we measured and evaluated two different light-output data from individual crystal samples (two different sizes of needles): The scintillation light output received by the PMT as used in PET (LOPET) and'the intrinsic light output (ILO). The ILO data, were measured with the largest side of crystal needles coupled to the PMT (crystal needles "lying down onto the PMT"), the LOPET data, were measured with the smallest crystal end coupled to the PMT as used in a PET detector (the crystal is "standing up" on the PMT). The pulse-height spectra for both ILO and LOPET were acquired for all the individual crystal samples, for deducing the percentages of light loss from self-absorption (LLSA) in the PET detector configuration, and energy resolution in both positions (ILO-ER and LOPET-ER). With these crystals, four detectors blocks were also developed, and we measured the overall light output and the position-decoding maps to gauge the decoding capability (DC) of the crystals. We also compared the visual color and clarity of individual crystals and detector blocks. For the two different sizes of the crystal samples that we received, we have the following finding: (a) For the 1.3×1.3×10 mm crystals "standing up" as used in a PET camera, GSO, MLS and LYSO, lost almost half of the light while LSO lost more than 2/3 thereby ended up with the same light output as GSO. The energy resolution of LSO and GSO are quite similar (16% and 15%); but the light absorption is significant higher in LSO (71%) in comparison to GSO (54%), MLS (52%) and LYSO (48%). (b) For the 2×2×10 mm, the light loss from self-absorption (LLSA) was less than the 1.3 mm samples. MLS has the lowest self-absorption (26%), while GSO and LSO have the highest light loss. LGSO and LSO have the lowest LOPET for all the lutetium crystals tested. (c) From the position-decoding results from the detector blocks, LYSO, MLS and GSO provided better position-decoding resolution than the LSO. (d) For the visually comparison, LSO were visually much darker than the other Lutetium crystals.

Original languageEnglish (US)
Title of host publication2005 IEEE Nuclear Science Symposium Conference Record -Nuclear Science Symposium and Medical Imaging Conference
Pages2835-2839
Number of pages5
DOIs
StatePublished - Dec 1 2005
EventNuclear Science Symposium Conference Record, 2005 IEEE - , Puerto Rico
Duration: Oct 23 2005Oct 29 2005

Publication series

NameIEEE Nuclear Science Symposium Conference Record
Volume5
ISSN (Print)1095-7863

Other

OtherNuclear Science Symposium Conference Record, 2005 IEEE
CountryPuerto Rico
Period10/23/0510/29/05

ASJC Scopus subject areas

  • Radiation
  • Nuclear and High Energy Physics
  • Radiology Nuclear Medicine and imaging

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    Ramirez, R. A., Wong, W-H., Kim, S., Baghaei, H., Li, H., Wang, Y., Zhang, Y., Liu, S., Liu, J., Xie, S., & Liu, Y. (2005). A comparison of BGO, GSO, MLS, LGSO, LYSO and LSO scintillation materials for high-spatial-resolution animal PET detectors. In 2005 IEEE Nuclear Science Symposium Conference Record -Nuclear Science Symposium and Medical Imaging Conference (pp. 2835-2839). [1596923] (IEEE Nuclear Science Symposium Conference Record; Vol. 5). https://doi.org/10.1109/NSSMIC.2005.1596923