Pulse shape discriminations of different types of radiation on GGAG imaging detector
Pulse shape discriminations of different types of radiation on GGAG imaging detector
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GGAG成像探测器上不同类型辐射的脉冲形状辨别
DOI：
10.1016/j.nima.2018.09.026
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
Hideo Nitta
中科院分区：
文献类型：
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作者：
S. Yamamoto;Hideo Nitta
Gd 3（GaAl）5 O 12：Ce（GGAG）是一种最初用于X射线CT的陶瓷闪烁体，当它与位置敏感光电倍增管（PSPMT）结合时，它也是开发基于逐事件的辐射成像探测器的优良材料。使用开发的GGAG成像探测器，我们发现α粒子和γ光子的衰变时间是不同的。此外，我们发现α粒子和β粒子的衰变时间是不同的。这些特性对于开发用于使用脉冲形状鉴别对不同类型的辐射同时成像的成像探测器是有利的。因此，我们测试了分离的α粒子和γ光子的图像使用脉冲形状歧视。此外，我们评估了α和β粒子图像的分离。在脉冲形状谱中，我们可以分离Am-241 α粒子和Cs-137 γ光子的峰，峰谷比（P/V）为3.5。我们得到了清晰的分离图像Am-241 α粒子和Cs-137 γ光子使用脉冲形状歧视。我们还可以在脉冲形状谱中分离出P/V为1.5的Am-241 α粒子和Sr-Y-90 β粒子的峰。我们使用脉冲形状辨别获得了Am-241 α粒子和Sr-Y-90 β粒子的分离图像。此外，我们可以分离静电收集的自然α粒子，Po-218和Po-214，从环境β粒子和伽马光子使用脉冲形状歧视。我们得出结论，GGAG成像探测器是有前途的同时成像和分离的图像不同类型的辐射，使用脉冲形状歧视。
Gd3(GaAl)5O12:Ce (GGAG) is a ceramic scintillator originally developed for X-ray CT, and it was also an excellent material for the development of an event-by-event-based radiation imaging detector when it was combined with a position sensitive photomultiplier (PSPMT). With the developed GGAG imaging detector, we found that the decay times for alpha particles and gamma photons were different. Also, we found that the decay times for alpha particles and beta particles were different. These characteristics are advantageous for developing an imaging detector for the simultaneous imaging of different types of radiation using pulse shape discrimination. Thus, we tested the separation of the images of the alpha particles and gamma photons using pulse shape discrimination. Also, we evaluated the separation of the alpha and beta particle images. In the pulse shape spectra, we could separate the peaks of Am-241 alpha particles and Cs-137 gamma photons with a peak-to-valley ratio (P/V) of 3.5. We obtained clearly separated images for Am-241 alpha particles and Cs-137 gamma photons using pulse shape discrimination. We could also separate the peaks of Am-241 alpha particles and Sr–Y-90 beta particles with a P/V of 1.5 in the pulse shape spectrum. We obtained separated images for Am-241 alpha particles and Sr–Y-90 beta particles using pulse shape discrimination. In addition, we could separate electrostatically collected natural alpha particles, Po-218 and Po-214, from the environmental beta particles and gamma photons using pulse shape discrimination. We conclude that the GGAG imaging detector is promising for simultaneous imaging and separating the images of different types of radiation using pulse shape discrimination.
开发基于柔性光纤的高分辨率集成 PET/MRI 系统：iPET/MRI II
DOI：
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发表时间：
2011
期刊：
影响因子：
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作者：
Yamamoto S;Aoki M;Sugiyama E;Watabe H;Watabe T;Kanai Y;Imaizumi M;Shimosegawa E;Hatazawa J.
通讯作者：
Hatazawa J.
不同Ce含量双层GSO探测器脉冲形状分析积分时间的优化
DOI：
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发表时间：
2008
期刊：
Nuclear Instruments and Methods in Physics research A 587
影响因子：
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作者：
Nalu;Navarro-Alvarez;Koichi Ogawa;村石雅明;尾川浩一;Koichi Ogawa;Koichi Ogawa;Koichi Ogawa;S. Yamamoto;Seiichi Yamamoto
通讯作者：
Seiichi Yamamoto