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相关概念视频

Light Acquisition02:16

Light Acquisition

8.0K
In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light acquisition. Leaves can be only millimeters in width or tens of meters wide, depending on the environment. Due to competition for sunlight, evolution has driven the evolution of increasingly larger leaves and taller plants, to avoid shading by their neighbors with contaminant elaboration of root architecture and mechanisms to transport water and nutrients.
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Imaging Biological Samples with Optical Microscopy01:18

Imaging Biological Samples with Optical Microscopy

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Optical microscopy uses optic principles to provide detailed images of samples. Antonie van Leeuwenhoek designed the first compound optical microscope in the 17th century to visualize blood cells, bacteria, and yeast cells. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes with enhanced magnification and resolution.
In optical microscopy, the specimen to be viewed is placed on a glass slide and clipped on the stage...
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Phase Contrast and Differential Interference Contrast Microscopy01:26

Phase Contrast and Differential Interference Contrast Microscopy

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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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X-ray Imaging01:24

X-ray Imaging

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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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相关实验视频

Updated: May 6, 2026

Fabrication and Characterization of Optical Tissue Phantoms Containing Macrostructure
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Fabrication and Characterization of Optical Tissue Phantoms Containing Macrostructure

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开发一个用于多光谱成像的多参数幻影系统.

Xingjun Gao1,2, Xiaopeng Chen3, Zhisheng Wu4

  • 1School of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China.

Biomedical optics express
|December 10, 2025
PubMed
概括
此摘要是机器生成的。

一个新的,具有成本效益的幻影系统允许可调节的氧和和多层组织模拟. 这种标准化的平台增强了用于生理参数可视化的多光谱成像设备的评估.

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相关实验视频

Last Updated: May 6, 2026

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Fabrication and Characterization of Optical Tissue Phantoms Containing Macrostructure

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Agarose-based Tissue Mimicking Optical Phantoms for Diffuse Reflectance Spectroscopy
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科学领域:

  • 生物医学光学 生物医学光学
  • 医学成像技术 医学成像技术
  • 生物光子学 生物光子学

背景情况:

  • 多光谱成像可视化生理参数,如氧和度 (SO2) 和脂质分布.
  • 目前的组织幻影缺乏分层结构和可追溯标准,限制了成像技术的性能评估.

研究的目的:

  • 开发一个多参数,多层的幻影系统,用于评估多光谱内镜成像.
  • 为测量氧和度建立可追溯的校准标准.

主要方法:

  • 创建了一个新的幻影系统,具有双向调节的SO2和不同的血管,粘膜和脂质层.
  • 一个血液气体分析仪被集成为可追溯的SO2校准的参考标准.
  • 使用开发的幻影系统验证了两种多光谱内镜成像方法.

主要成果:

  • 幻影系统成功模拟了可调节的SO2和多层组织结构.
  • 使用集成血液气体分析仪实现了可追溯的SO2校准.
  • 幻影使两种多谱内镜成像技术的有效验证成为可能.

结论:

  • 提出的经济高效的幻影系统解决了现有方法的局限性.
  • 该平台为评估生理参数可视化内镜器件提供了一种标准化的方法.
  • 该系统促进了对临床应用的成像技术的改进评估.