Performance comparison of Si-PM-based block detectors with different pixel sizes for an ultrahigh-resolution small-animal PET system

Seiichi Yamamoto*, Hiroshi Watabe, Jun Hatazawa

*この研究の対応する著者

研究成果: Article査読

19 被引用数 (Scopus)

抄録

The silicon photomultiplier (Si-PM) is a promising photodetector for a high-resolution PET scanner due to its small size, high gain and lower sensitivity to magnetic fields. There are several commercially available Si-PM arrays with different pixel sizes and fill factors, and these parameters can affect the performance of a PET block detector read out by these devices. We compared the performance of block detectors using 4 × 4 Si-PM arrays with 25 νm (Hamamatsu S11064-025P) and 50 νm (S11064-050P) pixels combined with the same 15 × 15 matrix LGSO block made of 0.7 × 0.7 × 6 mm3 scintillator pixels. Evaluated characteristics include photopeak linearity, energy resolution and positioning performance. Although the photopeak linearity and energy resolution are slightly better for the Si-PM with 25 νm pixels, the position performance measured by the separation of the position histogram is significantly better for the Si-PM with 50 νm pixels. We conclude that using the Si-PM with 50 νm pixels will provide a better solution for the development of ultrahigh-resolution PET systems.

本文言語English
ページ(範囲)N227-N236
ジャーナルPhysics in Medicine and Biology
56
20
DOI
出版ステータスPublished - 2011 10月 21
外部発表はい

ASJC Scopus subject areas

  • 放射線技術および超音波技術
  • 放射線学、核医学およびイメージング

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