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Reducing environmental scattering in industrial computed tomography by system redesign

机译:通过系统重新设计减少工业计算机断层摄影中的环境散射

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摘要

X-ray tomographic image quality is degraded by radiation scattered in the sample and the environment. In this paper, a computed tomography (CT) system with 450 kV source is optimized for low environmental scattering. Monte Carlo simulations of different CT-configurations predict a reduction of environmental scattering by (81 ± 4)%. An optimized setup is characterized by a large detector housing from thin composite plates, a thin mirror, and cabin walls lined with metallic plates. In radiography experiments, the contrast improves by (22 ± 2)% for 50 mm thick aluminium objects and by (35 ± 4)% for 160 mm thick aluminium parts. The improvement in tomographic imaging matches the radiography results.
机译:X射线断层图像的质量会因样品和环境中散布的辐射而降低。本文针对低环境散射优化了具有450 kV源的计算机断层扫描(CT)系统。不同CT构型的蒙特卡洛模拟预测,环境散射降低了(81±4)%。优化的设置的特征是大型探测器外壳,由薄复合板,薄镜子和衬有金属板的机舱壁组成。在射线照相实验中,对于50毫米厚的铝制物体,对比度提高(22±2)%,对于160毫米厚的铝制部件,对比度提高(35±4)%。层析成像的改进与射线照相结果相匹配。

著录项

  • 来源
    《NDT & E international》 |2013年第9期|36-42|共7页
  • 作者单位

    Empa, Swiss Federal Laboratories for Materials Science and Technology, UEberlandstrasse 129, 8600 Duebendorf, Switzerland;

    Department of Physics and NAST Centre, University of Rome Tor Vergata, via della Ricerca Scientifica 1, Rome 00133, Italy;

    Empa, Swiss Federal Laboratories for Materials Science and Technology, UEberlandstrasse 129, 8600 Duebendorf, Switzerland;

    Empa, Swiss Federal Laboratories for Materials Science and Technology, UEberlandstrasse 129, 8600 Duebendorf, Switzerland;

    Empa, Swiss Federal Laboratories for Materials Science and Technology, UEberlandstrasse 129, 8600 Duebendorf, Switzerland;

    Empa, Swiss Federal Laboratories for Materials Science and Technology, UEberlandstrasse 129, 8600 Duebendorf, Switzerland;

    Empa, Swiss Federal Laboratories for Materials Science and Technology, UEberlandstrasse 129, 8600 Duebendorf, Switzerland;

  • 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

    X-ray scattering; Environmental scattering; Monte Carlo simulations; GEANT4; Cone beam computed tomography;

    机译:X射线散射;环境散射;蒙特卡洛模拟;GEANT4;锥束计算机断层扫描;

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