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首页> 外文期刊>NDT & E international >System-independent material classification through X-ray attenuation decomposition from spectral X-ray CT
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System-independent material classification through X-ray attenuation decomposition from spectral X-ray CT

机译：通过光谱X射线CT的X射线衰减分解进行系统独立的材料分类

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摘要

We present a method for material classifications in spectral X-ray Computed Tomography (SCT) taking advantage of energy-resolving 2D detectors to simultaneously extract the energy dependence of a material's linear attenuation coefficient (LAC). The method employs an attenuation decomposition presented by Alvarez et al., and estimates system-independent material properties of electron density (ρ_e) and effective atomic number (Z_(eff)), independent of the scanner, from the energy-dependent LAC measurements. The method uses a spectral correction algorithm and the energy range is truncated to exclude bins with photon starvation and spectral distortion present even after correction of detector response. A novel technique of energy bin selection is used for optimized classification performance. The method is tested against another SCT classification method called SRZE for inspecting materials in the range of 6 ≤ Z_(eff) ≤ 23. Our method aims at an increase in the speed of pot processing workflow after the data acquisition, and it achieves explicitly up to 32 times better time efficiency for the reconstruction with comparable accuracy for a range of materials important in threat detection.
机译：我们介绍了一种用于光谱X射线计算机断层扫描（SCT）的材料分类方法，利用能量分辨2D检测器同时提取材料的线性衰减系数（LAC）的能量依赖性。该方法采用Alvarez等人呈现的衰减分解，并估计从能量依赖的LAC测量的扫描仪独立于电子密度（ρ_e）和有效原子数（Z_（ef））的系统无关的材料特性。该方法使用光谱校正算法，并且能量范围被截断以排除具有光子饥饿的垃圾箱和即使在校正检测器响应之后也存在光谱失真。一种新颖的能量箱选择技术用于优化的分类性能。该方法针对另一个称为SRZE的SCT分类方法测试，用于检查6≤z_（eff）≤23的范围内的材料。我们的方法旨在增加数据采集后的POT处理工作流程的速度，并且它明确地实现了以相当的精度为一系列重要的威胁检测，重建的时间效率为32倍。

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  • 来源
    《NDT & E international》 |2020年第12期|102336.1-102336.12|共12页
  • 作者

    Doniyor Jumanazarov; Jakeoung Koo; Matteo Busi; Henning F. Poulsen; Ulrik L. Olsen; Mihai Iovea;

  • 作者单位

    Technical University of Denmark DTU Physics 2800 Kgs. Lyngby Denmark ACCENT PRO 2000 s.r.l (AP2K) Nerva Traian 1 K6 Ap. 26 Bucharest S3 031041 Romania;

    Technical University of Denmark DTU Compute 2800 Kgs. Lyngby Denmark;

    Paud Scherrer Institute Forschungsstrasse 111 5232 Villigen Switzerland Technical University of Denmark DTU Physics 2800 Kgs. Lyngby Denmark;

    Technical University of Denmark DTU Physics 2800 Kgs. Lyngby Denmark;

    Technical University of Denmark DTU Physics 2800 Kgs. Lyngby Denmark;

    ACCENT PRO 2000 s.r.l (AP2K) Nerva Traian 1 K6 Ap. 26 Bucharest S3 031041 Romania;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Spectral X-ray CT; Electron density; Effective atomic number; Photon counting detectors; Security screening;

    机译：光谱X射线CT;电子密度;有效原子序数;光子计数探测器;安全筛选;

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