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

作者：Kamada Kei^*; Shimazoe Kenji; Ito Shigeki; Yoshino Masao; Endo Takanori; Tsutsumi Kousuke; Kataoka Jun; Kurosawa Shunsuke; Yokota Yuui; Takahashi Hiroyuki; Yoshikawa Akira

来源：IEEE Transactions on Nuclear Science, 2014, 61(1): 348-352.

DOI：10.1109/TNS.2013.2290319

• Avalanche photodiode (APD)
• positron emission tomography (PET)
• scintillator

A novel digital PET scanner based on Time over Threshold method is developed. The positron emission tomography (PET) is composed of 144channel Ce:Gd3Al2Ga3O12 (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 Na-22 source.

• 出版日期2014-2