Optical Instruments, Volume. 41, Issue 5, 76(2019)
Study of X-ray backscatter system based on flying-spot scanning
Figures & Tables(17)
Fig. 1. Schematic of flying-spot scanning X-ray backscatter imaging
Fig. 4. Relationship between plastic scintillator thickness and deposition efficiency
Fig. 5. Experimental prototype of flying-spot scanning X-ray backscatter imaging
Table 1. Comparison of structural parameters of several sets of chopper wheels
View tableView in ArticleTable 1. Comparison of structural parameters of several sets of chopper wheels
n α/ (°)R /mmr /mmm /kgJ /(kg·mm2)3 23.7 121.2 60.6 2.9 24 119.2 4 23.7 148.5 105.0 3.5 47 643.2 6 23.7 210.0 181.9 5.4 145 701.2 8 23.7 274.4 253.5 8.1 355 638.5
Table 2. Chopper wheel specific parameters
View tableView in ArticleTable 2. Chopper wheel specific parameters
n b /mmR /mmr /mmm /kgJ /(kg·mm2)4 0.5 153.5 88 4 54 868.5
Table 3. X-ray detector performance
View tableView in ArticleTable 3. X-ray detector performance
探测器类型 探测能区 能量分辨率 温度特性 探测效率 时间分辨率/s 气体探测器 500 eV～15 keV 高 受影响小 低 10−4～10−5 半导体探测器 500 eV～200 keV 高 低温环境 高 10−4～10−8 闪烁体探测器 1 eV～1 GeV 较高 常温环境 高 10−4～10−9
Table 4. Characteristics of commonly used scintillator materials
View tableView in ArticleTable 4. Characteristics of commonly used scintillator materials
闪烁体 密度/（g·cm−3） 折射率 发光峰值波长/nm 衰减时间/ns 相对发光强度 潮解程度 NaI（TI） 3.67 1.85 410 230 100 易潮解 BGO 7.13 2.15 480 300 15 不潮解 CsI（TI） 4.51 1.80 530 1 000 45~50 轻微潮解 Pure CsI 4.51 1.80 310 10 <10 轻微潮解 BaF2 4.88 1.58 220/325 0.9/630 20 轻微潮解 GSO : Ce 6.71 1.85 310/430 30 20 不潮解 Plastic 1.03 1.58 400 2.0 25 不潮解 LSO 7.35 1.82 420 40 70 不潮解 PWO 8.28 2.16 470 15 0.7 不潮解 YAP 5.55 1.97 380 30 40 不潮解
Table 5. Boundary resolution of horizontal direction of PMMA sample
View tableView in ArticleTable 5. Boundary resolution of horizontal direction of PMMA sample
光源功率/W 外边界分辨率/mm 钨钢边界分辨率/mm 60 kV 100 kV 150 kV 60 kV 100 kV 150 kV 300 2.156 2.649 3.593 2.380 2.011 2.386 500 1.999 2.671 2.129 2.286 2.545 2.895 750 1.928 1.881 1.732 2.262 4.724 3.012
Table 6. Boundary resolution of vertical direction of PMMA sample
View tableView in ArticleTable 6. Boundary resolution of vertical direction of PMMA sample
光源功率/W 外边界分辨率/mm 钨钢边界分辨率/mm 60 kV 100 kV 150 kV 60 kV 100 kV 150 kV 300 2.156 2.649 3.593 2.380 2.011 2.386 500 1.999 2.671 2.129 2.286 2.545 2.895 750 1.928 1.881 1.732 2.262 4.724 3.012
Table 7. PSNR and IV of toy-car images
View tableView in ArticleTable 7. PSNR and IV of toy-car images
光源功率/W PSNR IV 60 kV 100 kV 150 kV 60 kV 100 kV 150 kV 300 33.277 31.627 27.883 6.431e+06 1.313e+07 2.426e+07 500 31.236 28.407 24.100 1.173e+07 2.871e+07 5.201e+07 750 29.830 26.846 21.575 2.039e+07 5.520e+07 1.030e+08
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Tian TANG, Jie XU, Xin WANG, Baozhong MU. Study of X-ray backscatter system based on flying-spot scanning[J]. Optical Instruments, 2019, 41(5): 76
Paper Information
Category: Research Articles
Received: Jan. 15, 2019
Accepted: --
Published Online: May. 19, 2020
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