Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2007, Vol. 18 ›› Issue (5): 302 doi: 10.1016/S1001-8042(07)60066-9


Development of a compact high resolution gamma-ray detector for E-CT applications

ZHU Jie1 MA Hongguang1 MA Wenyan1 ZENG Hui2* WANG Zhaomin2 XU Zizhong2   

  1. 1 Department of Nuclear Engineering, The Second Artillery Engineering Institute, Xi’an 710025, China;
    2 Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China
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ZHU Jie MA Hongguang MA Wenyan ZENG Hui WANG Zhaomin XU Zizhong. Development of a compact high resolution gamma-ray detector for E-CT applications.Nuclear Science and Techniques, 2007, 18(5): 302     doi: 10.1016/S1001-8042(07)60066-9

Abstract: A compact gamma-ray detector with good spatial resolution for emission computed tomography (E-CT) applications has been developed. The detector is composed of NaI(Tl) scintillation pixels array and Hamamastu R2486-05 PSPMT. Having a pixel size of 2 mm × 2 mm and an overall dimension of 48.2 mm × 48.2mm × 5 mm, it has 484 pixels in a 22×22 matrix. An average spatial resolution of 2.5mm (FWHM) was achieved. The slope of posi-tion linearity is constant within 10% in a range of 40mm. After corrections, the average value of differential non-linearity and absolute non-linearity were 0.16mm and 0.535mm respectively, and a 17% at FWHM of total energy resolution for 241Am was obtained.

Key words: E-CT, Pixels array, PSPMT, Position linearity, Spatial resolution