The performance study of developed cost-effective Compton Camera based on Ce:GAGG scintillator using experimental measurements and CCMod of GATE simulation module
The performance study of developed cost-effective Compton Camera based on Ce:GAGG scintillator using experimental measurements and CCMod of GATE simulation module
复制标题
利用实验测量和GATE模拟模块的CCMod对开发的基于Ce:GAGG闪烁体的高性价比康普顿相机进行性能研究
DOI：
10.1088/1748-0221/17/10/p10012
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发表时间：
2022
影响因子：
1.3
通讯作者：
Watabe Hiroshi
中科院分区：
文献类型：
--
作者：
Zarei Hajar;Nagao Yuto;Yamamoto Kohei;Itoh Masatoshi;Yamaguchi Mitsutaka;Kawachi Naoki;Watabe Hiroshi
在我们之前的工作中，我们研制了一台低成本的康普顿相机(CC)，它使用Ce掺杂的Gd3(Al，Ga)5O12(Ce：GaG)闪烁体，由两个探测器组成，散射体(20.8×20.8×5mm3)和吸收体(41.7×41.7×10mm3)，可以成像能量大于511keV的伽马射线。这项研究制作了一种新开发的CC，具有更大的散射体和更薄的吸收体。该系统由两个探测器组成：Ce：GaG闪烁体的散射体和吸收体。散射体和吸收体的大小相同；一个40 mm×40 mm×5 mm的阵列块由40×40á像素组成。对于两种系统，每个闪烁体像素的大小都是0.85 mm×0.85 mm。对Na-22和Cs-137点源进行了成像实验，考察了新相机的成像能力，并将获得的数据与以前的CC进行了比较。目前的CC的绝对探测效率(DEa)和光峰探测效率(DEp)分别比以前提高了1.6倍和2倍。同时，在511keV时，两个系统的空间分辨率和角分辨率几乎相同。位于v9号登机口的康普顿相机模块(CCMod)。0被用来进行蒙特卡罗模拟，以再现显示良好一致性的实验数据。
In our previous work, a cost-effective Compton camera (CC) using Ce doped Gd 3 (Al, Ga) 5 O 12 (Ce: GAGG) scintillator consisting of two detectors, scatterer (20.8× 20.8× 5 mm 3) and absorber (41.7× 41.7× 10 mm 3), was developed to image gamma rays having energy more than 511 keV. This study fabricated a newly developed CC with a larger scatterer and thinner absorber. The system consists of two detectors: a scatterer and an absorber of Ce: GAGG scintillator. The size of the scatterer and absorber is the same; a 40-mm× 40-mm× 5-mm array block consists of 40× 40ápixels. The size of each scintillator pixel is 0.85 mm× 0.85 mm for both systems. Imaging experiments of Na-22 and Cs-137 point sources were performed to investigate the imaging capability of the new camera, and then the obtained data were compared to the previous CC. The current CC's absolute detection efficiency (DE a) and photopeak detection efficiency (DE p) are improved by 1.6 and 2 times greater than the previous one. At the same time, both systems' spatial and angular resolutions are almost the same value at 511 keV. The Compton camera module (CCMod) in GATE v9. 0 was employed for Monte Carlo simulations to reproduce the experimental data showing a goodáagreement.