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相关概念视频

Computed Tomography01:10

Computed Tomography

8.0K
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...
8.0K
Electron Microscope Tomography and Single-particle Reconstruction01:07

Electron Microscope Tomography and Single-particle Reconstruction

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Transmission electron microscopy (TEM) can be used to determine the 3D structure of biological samples with the help of techniques such as electron microscope tomography and single-particle reconstruction. While single-particle reconstruction can examine macromolecules and macromolecular complexes in vitro conditions only, tomography permits the study of cell components or small cells in vivo.
Electron Tomography
Electron tomography can be performed either in TEM or STEM (scanning transmission...
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相关实验视频

Updated: Jan 17, 2026

Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle
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Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle

Published on: January 3, 2016

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一种新的散射校正方法,用于基于CBCT成像的能量分辨光子计数探测器.

Xin Zhang1,2, Heran Wang1,2, Yuhang Tan1

  • 1Research Center for Advanced Detection Materials and Medical Imaging Devices, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China.

Journal of X-ray science and technology
|September 25, 2025
PubMed
概括

基于光子计数探测器 (PCD) 的圆束CT (CBCT) 成像中,e-Grid散射校正方法有效地减少了工件. 这种技术通过在低能耗和高能耗扫描中减轻散射阴影,显著提高图像质量.

关键词:
在CBCT成像中使用CBCT成像.光子计数探测器的探测器散射 散射 分散 散射

更多相关视频

Visualization of Low-Level Gamma Radiation Sources Using a Low-Cost, High-Sensitivity, Omnidirectional Compton Camera
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Visualization of Low-Level Gamma Radiation Sources Using a Low-Cost, High-Sensitivity, Omnidirectional Compton Camera

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Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating
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Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating

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相关实验视频

Last Updated: Jan 17, 2026

Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle
15:06

Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle

Published on: January 3, 2016

13.4K
Visualization of Low-Level Gamma Radiation Sources Using a Low-Cost, High-Sensitivity, Omnidirectional Compton Camera
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Visualization of Low-Level Gamma Radiation Sources Using a Low-Cost, High-Sensitivity, Omnidirectional Compton Camera

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Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating
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科学领域:

  • 医疗成像医学成像
  • 光子计数探测器技术的技术
  • 圆束CT CT 圆束

背景情况:

  • 高质量的CT成像需要减轻散射阴影工件.
  • 基于能量分辨光子计数探测器 (PCD) 的圆束CT (CBCT) 系统容易受到这些工件的影响.

研究的目的:

  • 评估PCD CBCT中散射校正的e-Grid方法.
  • 为了评估其在去除散射阴影文物方面的能力.

主要方法:

  • 电网方法使用PCD能量窗口的高能和低能信号之间的线性近似.
  • 校准实验确定了模型参数.
  • 物理验证是在PCD CBCT基板系统上使用头部和腹部幻影进行的.

主要成果:

  • 电子电网方法在低能和高能PCD CBCT图像中显著消除了散射吸管器件.
  • 在各种物体维度中,散射器件减少了70%以上.

结论:

  • 电子电网方法显示了分散阴影工件减少的巨大潜力.
  • 它有效用于能量分辨PCD CBCT成像.