Development of a flexible end-shield using tungsten curtains for 3D PET

S. Yamamoto*, S. Sakamoto, K. Matsumoto, M. Senda

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


In the three-dimensional (3D) acquisition of positron emission tomograph (PET) without septa, random and scatter due to events from outside the field of view (FOV) become a serious problem. They decrease the signal to noise ratio and the quantitation of the image and also limit the count rate capability of the PET system. To reduce these effects, we developed a flexible end-shield using tungsten curtains (curtain-shield) that consists of a mobile stand, a cylindrical support, and flexible tungsten curtains. The tungsten curtains are made of four layers of 30 mm square, 1 mm thick tungsten plates contained in pockets of cloth. Because the tungsten curtains are flexible, they can safely be used even in body studies. Reduction of random and scatter were observed by using the curtain-shield in both phantom and human studies. Results indicate that the curtain-shield has a potential to improve the image quality of PET studies.

Original languageEnglish
Article number1710254
Pages (from-to)2671-2674
Number of pages4
JournalIEEE Transactions on Nuclear Science
Issue number5
Publication statusPublished - 2006 Oct
Externally publishedYes


  • End-shield
  • Flexible
  • Positron emission tomography (PET)
  • Tungsten

ASJC Scopus subject areas

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


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