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相关概念视频

Phase Contrast and Differential Interference Contrast Microscopy01:26

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Phase-Contrast Microscopes
In-phase-contrast microscopes, interference between light directly passing through a cell and light refracted by cellular components is used to create high-contrast, high-resolution images without staining. It is the oldest and simplest type of microscope that creates an image by altering the wavelengths of light rays passing through the specimen. Altered wavelength paths are created using an annular stop in the condenser. The annular stop produces a hollow cone of...
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相关实验视频

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X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging
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三向X射线相位对比多模式成像使用一个六角网格调制器.

Siwei Tao1, Zonghan Tian1, Ling Bai1

  • 1State Key Laboratory of Extreme Photonics and Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China.

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概括

一种新型的六角网格增强了用于临床诊断的X射线相对照成像 (XPCI). 这种方法简化了对齐,并改善了软组织对比度,为先进的成像应用铺平了道路.

关键词:
富里叶变换是什么意思 富里叶变换射线相位对比成像X射线相位对比成像图像重建 图像重建阶段检索检索阶段检索结构化照明结构化照明

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相关实验视频

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科学领域:

  • 医疗成像医学成像
  • 生物物理学的生物物理.
  • 材料科学 材料科学 材料科学

背景情况:

  • 射线相位对比成像 (XPCI) 与传统方法相比,提供了优越的软组织对比.
  • 由于严格的连贯性和对齐性要求,XPCI的临床应用受到阻碍.
  • 现有的基于网格的XPCI方法在对齐和可视化方面面临挑战.

研究的目的:

  • 开发一种易于调整的,基于六角网的XPCI方法,用于增强的临床诊断.
  • 同时获取不同相位对比 (DPC) 和暗场 (DF) 信号在三个方向与单一的射击.
  • 通过新的相位检索算法和假色重建,改善XPCI中的图像质量和可视化.

主要方法:

  • 在XPCI.中为结构化照明制造六角网格的制造.
  • 一次性采集DPC和DF信号在三个方向.
  • 开发一个没有工件的阶段检索算法和虚色DF图像重建.
  • 实施网格移位方法,以在受控辐射剂量下改善图像质量.

主要成果:

  • 数字模拟显示,在图像评估指标和可视化方面,六角网格优于方形网格.
  • 实验结果证实了六角网在真实成像系统中的可行性和优势.
  • 拟议的六角网格很容易制造,并且与高达300微米点大小的X射线源兼容.

结论:

  • 基于六角网的XPCI方法显著简化了对齐并增强了图像可视化.
  • 这种技术为软组织提供了改进的定量成像能力.
  • 这项研究为定量X射线非破坏性成像和X射线显微镜和CT等相关领域开辟了新的途径.