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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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X-ray Diffraction of Biological Samples01:10

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X-ray diffraction or XRD is an analytical tool that utilizes X-rays to study ordered structures such as crystalline organic and inorganic samples, polycrystalline materials, proteins, carbohydrates, and drugs.
According to Bragg's law, when X-rays strike the sample positioned on a stage, the rays are  scattered by the electron clouds around the sample atoms. The  X-ray diffraction or scattering is caused by constructive interference of the X-ray waves that reflect off the internal...
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Three-Dimensional Microscopy in Microbiology01:28

Three-Dimensional Microscopy in Microbiology

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Three-dimensional imaging techniques are essential in cell biology, allowing researchers to visualize intricate cellular structures with high resolution. Two prominent methods, Differential Interference Contrast Microscopy (DIC) and Confocal Scanning Laser Microscopy (CSLM), provide distinct advantages for imaging live and thick specimens, respectively.Differential Interference Contrast MicroscopyDIC microscopy enhances contrast in transparent, unstained samples by converting phase...
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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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Two-Dimensional Microscopy in Microbiology01:29

Two-Dimensional Microscopy in Microbiology

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Two-dimensional (2D) microscopy encompasses a range of optical techniques that capture images within a single focal plane, offering detailed representations of microscopic structures. These techniques are essential in biological and medical research, enabling the visualization of cellular and subcellular structures with different levels of contrast and specificity.There are several major types of 2D microscopy, each with strengths and applications.Bright-Field MicroscopyBright-field microscopy...
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相关实验视频

Updated: Jul 28, 2025

A Guide to Build a Highly Inclined Swept Tile Microscope for Extended Field-of-view Single-molecule Imaging
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走向虚拟组织学,使用X射线格子干扰计.

M Polikarpov1,2, J Vila-Comamala3, Z Wang3,4,5

  • 1Swiss Light Source, Paul Scherrer Institut, 5232, Villigen-PSI, Switzerland. mpolikarpov@ethz.ch.

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概括
此摘要是机器生成的。

两个新的X射线断层扫描系统为乳腺癌诊断提供高分辨率成像. 这些先进的系统提供比传统方法更好的对比度和分辨率,可能有助于他的病理学.

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Non-invasive 3D-Visualization with Sub-micron Resolution Using Synchrotron-X-ray-tomography
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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.
  • 在瘤学瘤学.

背景情况:

  • 乳腺癌的诊断依赖于临床检查,成像和活检,核心针活检是黄金标准.
  • 组织病理学使用显微镜进行形态和生化分析,但Z方向分辨率有限.
  • 当前的成像技术在乳腺组织样本中的细节解析方面存在局限性.

研究的目的:

  • 引入两种新型的高分辨率桌面系统,用于软组织样本的相对比X射线断层扫描.
  • 评估这些系统对人类乳腺样本成像的性能.
  • 评估这些系统作为临床遗传病理学中补充工具的潜力.

主要方法:

  • 开发和实施两相对比X射线断层扫描系统.
  • 系统1:经典的Talbot-Lau干扰仪用于人乳样本的ex-vivo成像.
  • 系统2:使用Sigray MAAST X射线源与结构性阳极对乳腺样本进行成像,包括在现场进行管道癌的乳腺样本.

主要成果:

  • 这两种系统都实现了高分辨率的成像,声素尺寸为5.57微米.
  • 证明了Sigray MAAST X射线源系统的适用性,用于在现场成像患有导管癌的人类乳腺样本.
  • 与以前的方法相比,实现了更高的分辨率和对比度,使得乳房内部样本特征可以更好地可视化.

结论:

  • 基于格的相位对比X射线CT系统可以提供高分辨率,高对比的乳腺组织成像.
  • 这些系统有望成为乳腺癌诊断中传统遗传病理学的补充工具.
  • 开发的桌面系统提供了一种可行的方法,用于乳腺样本的先进的ex-vivo分析.