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Basic experiments on radiation imaging by using Pr:Lu3Al5O12 (LuAG) small crystalline pixels with various reflector

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8 Author(s)
Kei Kamada ; Materials Research Laboratory, Furukawa Co., Ltd., 1-25-13, Kannondai, Tsukuba, Ibaraki, 305-0856, Japan ; Kousuke Tsutsumi ; Chisato Suzuki ; Yoshiyuki Usuki
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Pr:LuAG have good scintillation properties of high energy resolution, very fast 5d-4f emission decay time, higher density and high light yield. In order to apply Pr:LuAG to medical imaging application such PET and PEM, the optimization of light output and energy resolution of scintillators is very important. Especially Therefore, to choose a suited reflector is very important because Pr:LuAG has short emission wave length at 310 nm. In this work, we studied spatial and energy resolution of pixilated Pr:LuAG with various reflectors (Teflon tape, ESR, BaSO4) by irradiation of 22Na source. Using the BaSO4 reflector, the light output has increased by ~210% compared to the ESR reflector, and ~170% compared to the Teflon tape reflector. The BaSO4 reflector also resulted in the best improvement of the energy resolution up to 12%.

Published in:

2007 IEEE Nuclear Science Symposium Conference Record  (Volume:2 )

Date of Conference:

Oct. 26 2007-Nov. 3 2007