Development of an ultrahigh resolution block detector based on 0.4 mm Pixel Ce:GAGG scintillators and a silicon photomultiplier array

Seiichi Yamamoto, Jung Yeol Yeom, Kei Kamada, Takanori Endo, Craig S. Levin

研究成果: Article査読

21 被引用数 (Scopus)

抄録

Ce doped Gd3 Al2 Ga3 O12 (Ce:GAGG) is a newly developed single-crystal scintillator which has a large light output and longer emission light wavelength. The longer wavelength of the scintillation photons will produce a larger signal when coupled to typical silicon photomultiplier (Si-PM) as the quantum efficiency of semiconductor based photodetector is generally higher for light with longer wavelength. A block detector with higher spatial resolution may thus be realized by combining Ce:GAGG with Si-PM arrays. To achieve the highest possible spatial resolution for PET and SPECT detectors, we developed an ultrahigh resolution block detector using 0.4 mm×,0.4 mm× 5 mm Ce:GAGG pixels assembled to form a 24× 24 matrix that is coupled to an Si-PM array and evaluated the performance. All Ce:GAGG pixels were separated in the 2-dimensional position histograms for Cs-137 (662 keV) gamma photons with an average peak-to-valley (P/V) ratio of 2.4. The energy resolution was 21.6% FWHM for Cs-137 (662 keV) and 23.8% for Co-57 (122 keV) gamma photons. Since Ce:GAGG does not contain naturally occurring radioisotope (Lu), beta-gamma true coincidences can be avoided and randoms are reduced when used for PET detectors. Furthermore, this property, together with its high light output and good intrinsic energy resolution, make the scintillator suited for SPECT detectors. An ultrahigh resolution PET/SPECT hybrid system might be an interesting application using Ce:GAGG/Si-PM block detectors.

本文言語English
論文番号6651725
ページ(範囲)4582-4587
ページ数6
ジャーナルIEEE Transactions on Nuclear Science
60
6
DOI
出版ステータスPublished - 2013 12

ASJC Scopus subject areas

  • 核物理学および高エネルギー物理学
  • 原子力エネルギーおよび原子力工学
  • 電子工学および電気工学

フィンガープリント

「Development of an ultrahigh resolution block detector based on 0.4 mm Pixel Ce:GAGG scintillators and a silicon photomultiplier array」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル