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相关概念视频

X-ray Imaging01:24

X-ray Imaging

9.9K
German physicist Wilhelm Röntgen (1845–1923) was experimenting with electrical current when he discovered that a mysterious and invisible "ray" would pass through his flesh but leave an outline of his bones on a screen coated with a metal compound. In 1895, Röntgen made the first durable record of the internal parts of a living human: an "X-ray" image (as it came to be called) of his wife’s hand. Scientists worldwide quickly began their own experiments with...
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Computed Tomography01:10

Computed Tomography

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Tomography refers to imaging by sections. Computed tomography (CT) is a non-invasive imaging technique that uses computers to analyze several cross-sectional X-rays to reveal minute details about structures in the body.
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...
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相关实验视频

Updated: Jan 16, 2026

3D Imaging of Soft-Tissue Samples using an X-ray Specific Staining Method and Nanoscopic Computed Tomography
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3D Imaging of Soft-Tissue Samples using an X-ray Specific Staining Method and Nanoscopic Computed Tomography

Published on: October 24, 2019

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一个离散的灰度以前基于外观重建算法多色X射线CT多色彩的X射线CT.

Haifang Fu1,2, Zhiting Liu1,2, Yunsong Zhao1,2

  • 1School of Mathematical Sciences, Capital Normal University, Beijing, China.

Journal of X-ray science and technology
|September 26, 2025
PubMed
概括

这项研究引入了一种新的CT重建模型,PE-DG-PAEDS,用于多色彩的外部X射线成像. 该方法有效地减少了使用有限的投射数据对管状样品的非破坏性测试中的工件.

关键词:
这就是为什么CTCTCTCTCTCT在DART中使用DART.外观问题 外观问题影像成像技术 影像成像技术

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X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging
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X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging

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Visualization of Failure and the Associated Grain-Scale Mechanical Behavior of Granular Soils under Shear using Synchrotron X-Ray Micro-Tomography
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Visualization of Failure and the Associated Grain-Scale Mechanical Behavior of Granular Soils under Shear using Synchrotron X-Ray Micro-Tomography

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相关实验视频

Last Updated: Jan 16, 2026

3D Imaging of Soft-Tissue Samples using an X-ray Specific Staining Method and Nanoscopic Computed Tomography
07:01

3D Imaging of Soft-Tissue Samples using an X-ray Specific Staining Method and Nanoscopic Computed Tomography

Published on: October 24, 2019

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X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging
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X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging

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Visualization of Failure and the Associated Grain-Scale Mechanical Behavior of Granular Soils under Shear using Synchrotron X-Ray Micro-Tomography
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Visualization of Failure and the Associated Grain-Scale Mechanical Behavior of Granular Soils under Shear using Synchrotron X-Ray Micro-Tomography

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科学领域:

  • 医疗成像医学成像
  • 材料科学 材料科学 材料科学
  • 计算成像技术的成像

背景情况:

  • 外部CT成像使大管样本的非破坏性测试能够使用有限的探测器数据.
  • 外部CT成像中的不完整的投影数据带来了重大的重建挑战.
  • 多色X射线光谱在CT重建中引入了额外的复杂性和工件.

研究的目的:

  • 为多色谱外观问题开发一种新的CT重建模型.
  • 为了应对外部CT成像中不完整的投影数据所带来的挑战.
  • 为了改善多色X射线CT外观重建中的文物抑制.

主要方法:

  • 引入了多色外观离散灰度PAEDS (PE-DG-PAEDS) 模型.
  • 结合了离散灰度值的先验和使用多色谱信息的辐射规范化术语.
  • 采用了交替最小化方法和离散代数重建技术 (DART) 进行代重建.

主要成果:

  • 使用模拟和真实实验数据验证了PE-DG-PAEDS模型及其相关的DART算法.
  • 拟议的方法证明了多色X射线CT外观问题固有的工件的有效抑制.
  • 成功重建了外部CT图像,克服了数据不完整.

结论:

  • PE-DG-PAEDS模型为多色外观CT重建提供了一个强大的解决方案.
  • 开发的算法有效地减轻了文物,提高了非破坏性测试的质量.
  • 这项工作提升了外部CT成像用于分析管状结构的能力.