TY - JOUR
T1 - Resolution improvement using a fiber optic plate for a small field-of-view NaI(Tl) gamma camera
AU - Yamamoto, S.
N1 - Funding Information:
Manuscript received November 15, 2004; revised May 23, 2005. This work was supported in part by the Kansai Bureau, Ministry of Economy, Trade and Industry, Japan. The author is with the Kobe City College of Technology, Kobe 651-2194, Japan (e-mail: s-yama@kobe-kosen.ac.jp). Digital Object Identifier 10.1109/TNS.2005.862965 Fig. 1. Schematic diagrams of NaI(Tl) with a glass plate for light output (a) and with a fiber optic plate for light output (b).
PY - 2006/2
Y1 - 2006/2
N2 - 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.
AB - 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.
KW - Fiber optic plate
KW - Gamma camera
KW - NaI(Tl)
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U2 - 10.1109/TNS.2005.862965
DO - 10.1109/TNS.2005.862965
M3 - Article
AN - SCOPUS:33645672612
SN - 0018-9499
VL - 53
SP - 49
EP - 53
JO - IEEE Transactions on Nuclear Science
JF - IEEE Transactions on Nuclear Science
IS - 1
ER -