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相关概念视频

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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X-ray Diffraction of Biological Samples01:10

X-ray Diffraction of Biological Samples

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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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Electron Microscope Tomography and Single-particle Reconstruction01:07

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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: Mar 13, 2026

Non-invasive 3D-Visualization with Sub-micron Resolution Using Synchrotron-X-ray-tomography
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通过使用基于同步的X射线相对照成像方法进行体积测量方法重新检查的逆膜.

Sven Beckmann1, Cecilia Lotto2,3, Changling Li2,3,4

  • 1Department of Otorhinolaryngology, Head and Neck Surgery, Inselspital, Bern University Hospital, University of Bern, Bern.

Otology & neurotology : official publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology
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概括

同步光X射线相位对比成像显示了 retrotympanum 中显著的解剖学变异性. 始终发现一个以前未被描述的表面内,突出显示了这个中耳区域的复杂性.

关键词:
内镜耳部手术是一种耳部手术.脸部的深处是脸部的深处回音板的回形板是什么意思鼻 tympani 的 阴影.耳下侧鼻 (subtympanic sinus) 是一个非常重要的部位.表面的内是表面的内.基于同步的X射线相位对比成像.

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相关实验视频

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科学领域:

  • 人体解剖学 解剖学 解剖学
  • 医疗成像医学成像
  • 耳鼻喉科 耳鼻喉科 耳鼻喉科

背景情况:

  • 逆膜内含有骨的隙,经常涉及胆固醇瘤.
  • 这些小结构的有限可访问性挑战了传统的成像.
  • 了解逆膜解剖学对于手术规划和疾病管理至关重要.

研究的目的:

  • 使用基于同步的X射线相位对比成像 (SR X-PCI) 系统地分析逆膜子部位.
  • 为了描述顶部关系和体积特征的逆声深处.
  • 为了研究隙体积,深度分类和面部神经距离之间的相关性.

主要方法:

  • 使用SR X-PCI分析了十个人类骨.
  • 采集了微光扫描数据集,并对其进行了细分.
  • 确定并分析了关键的逆鼓膜空间,包括鼻,面部内,后鼻和侧耳 tympanic sinus.

主要成果:

  • 观察到显著的解剖学变异性,鼻腔 tympani 是最大的和后鼻腔是最小的隙平均.
  • 发现深坑体积与其深度分类之间存在正相关性.
  • 隙体积与面部神经距离之间存在反向相关性.
  • 在70%的标本中发现了一种新的表面隙.

结论:

  • SR X-PCI提供了有效的3D可视化和体积分析.
  • 这项研究证实了逆膜的复杂和可变的解剖学.
  • 发现了一个始终存在的,以前报告不足的表面内.