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武彤，王玲，许天照，等. 医疗CT用(Ce,Gd)3(Ga,Al)5O12(Ce:GGAG)闪烁体的研究进展[J]. 应用技术学报，2021，21（2）：109-125.. DOI: 10.3969/j.issn.2096-3424.21007
引用本文: 武彤，王玲，许天照，等. 医疗CT用(Ce,Gd)3(Ga,Al)5O12(Ce:GGAG)闪烁体的研究进展[J]. 应用技术学报，2021，21（2）：109-125.. DOI: 10.3969/j.issn.2096-3424.21007
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WU Tong, WANG Ling, Xu Tianzhao, WANG Hui, WANG Chaoyue, HUANG Xintang, SHEN Hui, SHI Yun. Recent Progress of (Ce,Gd)3(Ga,Al)5O12(Ce:GGAG) Scintillator for Medical CT Application[J]. Journal of Technology, 2021, 21(2): 109-125. DOI: 10.3969/j.issn.2096-3424.21007
Citation: WU Tong, WANG Ling, Xu Tianzhao, WANG Hui, WANG Chaoyue, HUANG Xintang, SHEN Hui, SHI Yun. Recent Progress of (Ce,Gd)3(Ga,Al)5O12(Ce:GGAG) Scintillator for Medical CT Application[J]. Journal of Technology, 2021, 21(2): 109-125. DOI: 10.3969/j.issn.2096-3424.21007
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医疗CT用(Ce,Gd)3(Ga,Al)5O12(Ce:GGAG)闪烁体的研究进展

Recent Progress of (Ce,Gd)3(Ga,Al)5O12(Ce:GGAG) Scintillator for Medical CT Application

    摘要
  • 摘要: (Ce,Gd)3(Ga,Al)5O12(Ce:GGAG)属于石榴石结构立方晶系，密度高（～6.7 g/cm3），有效原子序数大（55），对高能射线吸收能力强，用Bartram-Lempicki模型计算其理论光产额可达73500 pho/MeV，是目前发现的光产额最高的氧化物闪烁材料，且能量分辨率极佳（4.6% @ 662 keV，FWHM）。此外，研究工作还表明，经高剂量辐射后的Ce:GAGG晶体的抗辐照损伤性能与硅酸盐闪烁材料相比有较大优势，因而受到了国内外的广泛关注和研究，被认为是理想的新一代高性能CT探测器用闪烁材料。综述了近年来国内外Ce:GGAG闪烁体的研究进展，包括粉体、薄膜、陶瓷、晶体的制备，微结构和光学表征，组份调控与性能优化以及器件成像等。

     

    Abstract: (Ce,Gd)3(Ga,Al)5O12(Ce:GGAG) belongs to garnet cubic crystal system with high density（～6.7 g/cm3）, high effective atomic number（55）and strong absorption ability to high-energy rays. The theoretical light yield of (Ce,Gd)3(Ga,Al)5O12(Ce:GGAG) reaches 73500 pho/MeV calculated by Bartram-Lempicki model, which is the highest light yield in oxide scintillate material found so far, with excellent energy resolution（4.6% @ 662 keV, FWHM）. In addition, the research also shows that Ce:GAGG crystals under high dose of radiation show a better radiation hardness compared with silicate scintillation materials. Therefore, they have been widely studied in worldwide, and are considered to be an ideal scintillation material for a new generation of high-performance CT detectors. In this paper, the recent research progress of Ce:GGAG scintillator is reviewed, including the powdersfilms, ceramics and crystals, microstructure and optical characterization, composition engineering for performance optimization, as well as device imagination.

     

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