Development of a Prototype Detector Using APD-Arrays Coupled With Pixelized Ce:GAGG Scintillator for High Resolution Radiation Imaging

A novel digital PET scanner based on Time over Threshold method is developed. The positron emission tomography (PET) is composed of 144channel Ce:Gd 3 Al 2 Ga 3 O 12 (GAGG)-Avaranche photodiode (APD) detector arrays individually coupled with custom designed Time over Threshold (ToT) application-spec...

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Bibliographic Details
Published in:IEEE transactions on nuclear science 2014-02, Vol.61 (1), p.348-352
Main Authors: Kamada, Kei, Shimazoe, Kenji, Ito, Shigeki, Yoshino, Masao, Endo, Takanori, Tsutsumi, Kousuke, Kataoka, Jun, Kurosawa, Shunsuke, Yokota, Yuui, Takahashi, Hiroyuki, Yoshikawa, Akira
Format: Article
Language:English
Subjects:
Animals
Application specific integrated circuits
Arrays
Avalanche photodiode (APD)
Detectors
Energy resolution
Field programmable gate arrays
Imaging
Joining
Positron emission
Positron emission tomography
positron emission tomography (PET)
scintillator
Spatial resolution
Thresholds
Tomography
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Summary:A novel digital PET scanner based on Time over Threshold method is developed. The positron emission tomography (PET) is composed of 144channel Ce:Gd 3 Al 2 Ga 3 O 12 (GAGG)-Avaranche photodiode (APD) detector arrays individually coupled with custom designed Time over Threshold (ToT) application-specific integrated circuit (ASIC) to realize the high count rate and good spatial resolution. Such an imaging system provides a simple front-end circuit and flexible digital signal processing like multiplexing such as a pulse train method. The measured energy resolution of the detector system was 6.7% for the 511 keV peak, and 4.25 ns time resolution was measured with a single detector module. The measured spatial resolution for a point source was 1.37 mm FWHM for our initial data with a columnar 22 Na source.
ISSN:0018-9499
1558-1578
DOI:10.1109/TNS.2013.2290319