Development of a large-area monolithic 4×4 MPPC array for a future PET scanner employing pixelized Ce

LYSO and Pr:LuAG crystals

T. Kato, Jun Kataoka, T. Nakamori, T. Miura, H. Matsuda, K. Sato, Y. Ishikawa, K. Yamamura, N. Kawabata, H. Ikeda, G. Sato, K. Kamada

    Research output: Contribution to journalArticle

    34 Citations (Scopus)

    Abstract

    We have developed a new type of large-area monolithic Multi-Pixel Photon Counter (MPPC) array consisting of a 4×4 matrix of 3×3 mm 2 pixels. Each pixel comprises 3600 Geiger mode avalanche photodiodes (APDs) that achieve an average gain of 9.68×105 at 71.9 V at 0 °C with variations of only ±7.2% over 4×4 pixels. Excellent uniformity was also obtained for photon detection efficiencies (PDE) of ±6.4%, whilst dark count rates at the single photoelectron (1 p.e.) level amounted to ≃2Mcps/pixel, measured at 0 °C. As the first step toward using the device in scintillation photon detectors, we fabricated a prototype gamma-ray camera consisting of an MPPC array optically coupled with a scintillator matrix, namely a 4×4 array of 3×3 ×10 mm 3 crystals. Specifically, we tested the performance with Ce-doped (Lu, Y)2(SiO4)O (Ce:LYSO), Pr-doped Lu3Al 5O12 (Pr:LuAG) and surface coated Pr:LuAG (Pr:LuAG (WLS)) matrices whereby the emission peak of Pr:LuAG was shifted from 310 to 420 nm via a wavelength shifter (WLS). Average energy resolutions of 13.83%, 14.70% and 13.96% (FWHM) were obtained for 662 keV gamma-rays, as measured at 0 °C with Ce:LYSO, Pr:LuAG and Pr:LuAG (WLS) scintillator matrices, respectively. We confirmed that the effective PDE for Pr:LuAG (WLS) had improved by more than 30% compared to original, non-coated Pr:LuAG matrix. These results suggest that a large-area monolithic MPPC array developed here could be promising for future medical imaging, particularly in positron emission tomography (PET).

    Original languageEnglish
    Pages (from-to)83-91
    Number of pages9
    JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
    Volume638
    Issue number1
    DOIs
    Publication statusPublished - 2011 May 11

    Fingerprint

    Positron emission tomography
    scanners
    positrons
    counters
    Photons
    tomography
    Pixels
    pixels
    Crystals
    photons
    crystals
    matrices
    Wavelength
    wavelengths
    Gamma rays
    Phosphors
    scintillation counters
    gamma rays
    Avalanche photodiodes
    Medical imaging

    Keywords

    • Gamma-rays
    • Multi-Pixel Photon Counter
    • Positron emission tomography

    ASJC Scopus subject areas

    • Instrumentation
    • Nuclear and High Energy Physics

    Cite this

    Development of a large-area monolithic 4×4 MPPC array for a future PET scanner employing pixelized Ce : LYSO and Pr:LuAG crystals. / Kato, T.; Kataoka, Jun; Nakamori, T.; Miura, T.; Matsuda, H.; Sato, K.; Ishikawa, Y.; Yamamura, K.; Kawabata, N.; Ikeda, H.; Sato, G.; Kamada, K.

    In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 638, No. 1, 11.05.2011, p. 83-91.

    Research output: Contribution to journalArticle

    Kato, T. ; Kataoka, Jun ; Nakamori, T. ; Miura, T. ; Matsuda, H. ; Sato, K. ; Ishikawa, Y. ; Yamamura, K. ; Kawabata, N. ; Ikeda, H. ; Sato, G. ; Kamada, K. / Development of a large-area monolithic 4×4 MPPC array for a future PET scanner employing pixelized Ce : LYSO and Pr:LuAG crystals. In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 2011 ; Vol. 638, No. 1. pp. 83-91.
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    AU - Kato, T.

    AU - Kataoka, Jun

    AU - Nakamori, T.

    AU - Miura, T.

    AU - Matsuda, H.

    AU - Sato, K.

    AU - Ishikawa, Y.

    AU - Yamamura, K.

    AU - Kawabata, N.

    AU - Ikeda, H.

    AU - Sato, G.

    AU - Kamada, K.

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