Resolution improvement using a fiber optic plate for a small field-of-view NaI(Tl) gamma camera

S. Yamamoto*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


To improve the spatial resolution of a small field-of-view gamma camera composed of a NaI(Tl) scintillator and a position sensitive photo-multiplier tube (PSPMT), the performance of an NaI(Tl) scintillator with a fiber optic plate for a light output was compared with that of such a scintillator using a conventional glass plate. Since the fiber optic plate limits the light distribution and makes it narrower, spatial resolution is improved. Using 20 × 20 mm, 2-mm-thick NaI(Tl) scintillators with a glass plate and with a fiber optic plate, performance was measured and compared. Using the fiber optic plate, the scintillation light output was 35% less than with a glass plate. The average spatial resolution with the fiber optic plate was 0.98-mm full width at half maximum (FWHM) while that with the glass plate was 1.48 mm FWHM for 122-keV, Co-57 gamma photons. Although light output decreased, spatial resolution dramatically improved. These results indicate that the Nal(Tl) with a fiber optic plate for light output is promising for PSPMT-based small field-of-view gamma cameras.

Original languageEnglish
Pages (from-to)49-53
Number of pages5
JournalIEEE Transactions on Nuclear Science
Issue number1
Publication statusPublished - 2006 Feb
Externally publishedYes


  • Fiber optic plate
  • Gamma camera
  • NaI(Tl)

ASJC Scopus subject areas

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


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