Evaluation of advanced methods and materials for construction of scintillation detector light guides.
Evaluation of advanced methods and materials for construction of scintillation detector light guides.
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DOI：
10.1016/j.apradiso.2021.109979
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发表时间：
2022-01
期刊：
影响因子：
--
通讯作者：
Mantz P
中科院分区：
文献类型：
--
作者：
Raylman RR;Johnson MB;Bintrim J;Dewasurendra V;Crawford K;Jaliparthi G;Martone P;Mantz P
用于制造光学透明结构的新技术（3D打印和铸造）可以应用于制造用于闪烁探测器的光导，特别是复杂形状的光导。在这项调查中，我们探讨了不同的制造方法和材料创建的样品光导的光谱transmittance。使用分光光度计测量样品的透射率，以确定它们与多种常用无机闪烁体（NaI（TI）、BGO、LaBr 3、LaCr 3、CSI（TI）和LYSO）的兼容性。这些测量结果表明，使用Somos WaterClear Ultra 10122®的Stratasys 3D打印机进行立体光刻，可以生产出与常见有机闪烁体最兼容的光导，特别是LYSO（峰值发射λ=420 nm）（一种常用于正电子发射断层扫描（PET）成像的闪烁体）。此外，Polytek Poly-Optic® 1730透明聚氨酯制成的铸造光导与这些散热器光学兼容性最好。为了证明使用3D打印和铸造方法创建独特形状的闪烁探测器的能力，使用由这些材料制成的光导将LYSO的小弧形片耦合到4 mm 2硅光电倍增管（SiPM）的4×4阵列。为了比较的目的，还使用标准丙烯酸树脂（一种常用于当前光导中的材料）制造光导。所有探测器都产生了类似的事件位置图。对于基于丙烯酸光导的探测器，18F（511 keV峰值）的能量分辨率为13%，而基于印刷光导的探测器为18%，基于铸造光导的探测器为20%。这项研究的结果表明，先进的制造方法有可能促进闪烁探测器的光导的创建。材料和方法的不断进步可能会导致3D打印结构的光学性能得到改善。
New techniques for fabrication of optically clear structures (3D printing and casting) can be applied to fabrication of light guides, especially complex shape ones, for scintillation detectors. In this investigation, we explored the spectral transmissivity of sample light guides created with different fabrication methods and materials. A spectrophotometer was used to measure the transmissivity of the samples to determine their compatibility with a number of commonly used inorganic scintillators (NaI(Tl), BGO, LaBr3, LaCr3, CSI(Tl) and LYSO). These measurements showed that stereolithography with a Stratasys 3D printer using Somos WaterClear Ultra 10122® produced the most compatible light guide with common organic scintillators, especially LYSO (peak emission λ=420 nm) (a scintillator commonly used in positron emission tomography (PET) imaging). Additionally, Polytek Poly-Optic® 1730 clear urethane produced a cast light guide that was the most optically compatible with these scintillators. To demonstrate the ability to create a unique shaped scintillation detector using 3D-printing and casting methods, a small arc-shaped piece of LYSO was coupled to a 4×4 array of 4 mm2 silicon photomultipliers (SiPM) using light guides made from these materials. For comparative purposes, a light guide was also fabricated using standard acrylic, a material often used in current light guides. All detectors produced similar event position maps. The energy resolution for 18F (511 keV photopeak) was 13% for the acrylic light-guide-based detector, while it was 18% for the printed light-guide-based detector and 20% for the cast light-guide-based detector. Results from this study demonstrate that advanced fabrication methods have the potential to facilitate creation of light guides for scintillation detectors. Continued advancements in materials and method will likely result in improved optical performance for 3D-printed structures.
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影响因子：
3.9
作者：
Jindal, Prashant;Juneja, Mamta;Breedon, Philip
通讯作者：
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影响因子：
3.5
作者：
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影响因子：
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作者：
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通讯作者：
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2.7
作者：
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影响因子：
1.6
作者：
Larson, CC;Salinger, H
通讯作者：
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