Development of a prototype detector using APD-arrays coupled with pixelized Ce:GAGG scintillator for high resolution radiation imaging

Kei Kamada, Kenji Shimazoe, Shigeki Ito, Masao Yoshino, Takanori Endo, Kousuke Tsutsumi, Jun Kataoka, Shunsuke Kurosawa, Yuui Yokota, Hiroyuki Takahashi, Akira Yoshikawa

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12 Citations (Scopus)

Abstract

A novel digital PET scanner based on Time over Threshold method is developed. The positron emission tomography (PET) is composed of 144channel Ce:Gd3Al2Ga3O12 (GAGG)-Avaranche photodiode (APD) detector arrays individually coupled with custom designed Time over Threshold (ToT) application-specific integrated circuit (ASIC) to realize the high count rate and good spatial resolution. Such an imaging system provides a simple front-end circuit and flexible digital signal processing like multiplexing such as a pulse train method. The measured energy resolution of the detector system was 6.7% for the 511 keV peak, and 4.25 ns time resolution was measured with a single detector module. The measured spatial resolution for a point source was 1.37 mm FWHM for our initial data with a columnar 22Na source.

Original languageEnglish
Article number6722988
Pages (from-to)348-352
Number of pages5
JournalIEEE Transactions on Nuclear Science
Volume61
Issue number1
DOIs
Publication statusPublished - 2014 Feb

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Keywords

  • Avalanche photodiode (APD)
  • Positron emission tomography (PET)
  • Scintillator

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering
  • Electrical and Electronic Engineering

Cite this

Kamada, K., Shimazoe, K., Ito, S., Yoshino, M., Endo, T., Tsutsumi, K., Kataoka, J., Kurosawa, S., Yokota, Y., Takahashi, H., & Yoshikawa, A. (2014). Development of a prototype detector using APD-arrays coupled with pixelized Ce:GAGG scintillator for high resolution radiation imaging. IEEE Transactions on Nuclear Science, 61(1), 348-352. [6722988]. https://doi.org/10.1109/TNS.2013.2290319