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相关概念视频

Super-resolution Fluorescence Microscopy01:37

Super-resolution Fluorescence Microscopy

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Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been...
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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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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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Confocal Fluorescence Microscopy01:16

Confocal Fluorescence Microscopy

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Confocal microscopy is an advanced microscopic technique. The prime advantage of the confocal microscope over other microscopy techniques is its ability to block the out-of-focus light from the illuminated samples using pinholes. It is widely used with fluorescence optics to obtain high-resolution, sharp contrast images. Unlike optical microscopes, confocal microscopes use a focused beam of light laser to scan the entire sample surface at different z-planes. These microscopes are, therefore,...
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Two-Dimensional Microscopy in Microbiology01:29

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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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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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相关实验视频

Updated: Jul 11, 2025

Multimodal Volumetric Retinal Imaging by Oblique Scanning Laser Ophthalmoscopy oSLO and Optical Coherence Tomography OCT
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通过复杂值网络的轴向超分辨率光学连贯性断层扫描.

Lingyun Wang1, Si Chen2, Linbo Liu2

  • 1School of Electronics and Information Engineering, Soochow University, Suzhou, People's Republic of China.

Physics in medicine and biology
|November 3, 2023
PubMed
概括

本研究介绍了一种复杂值超分辨率网络 (CVSR-Net) 用于光学一致性断层扫描 (OCT) 成像. 通过使用振幅和相位信息,CVSR-Net提高了轴分辨率,优于现有的方法.

关键词:
具有复杂价值的网络.光学连贯性断层扫描技术超级分辨率的超级分辨率

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科学领域:

  • 生物医学成像技术 生物医学成像技术
  • 光学工程是指光学工程.
  • 人工智能的人工智能

背景情况:

  • 光学连贯断层扫描 (OCT) 提供生物组织的高分辨率,非侵入性横截面图像.
  • 对于深度成像至关重要的OCT的轴分辨率受到光源带宽的限制,影响成本和性能.
  • 真实价值的深度学习已经显示出光学超分辨率成像的前景.

研究的目的:

  • 开发一种新的深度学习方法,用于OCT的轴向超分辨率.
  • 为了提高成像效果,利用来自OCT信号的振幅和相位信息.
  • 评估拟议方法的性能和概括能力.

主要方法:

  • 提出了一个专门为OCT数据设计的复杂值超分辨率网络 (CVSR-Net).
  • 在神经网络架构中利用了全复杂值的OCT信号,包括振幅和相位.
  • 在三个不同的OCT数据集上对CVSR-Net进行了评估,并将其与实值和复杂值网络对应器进行了比较.

主要成果:

  • 与其实值对应器相比,CVSR-Net表现出卓越的轴向超分辨率性能.
  • 拟议的复杂价值网络的表现优于现有的六个实值网络及其复杂价值版本.
  • 在非分布式数据集上,CVSR-Net保持了强大的超级分辨率性能,这表明了强大的泛化.

结论:

  • 复杂值的深度学习有效地提高了OCT成像中的轴分辨率.
  • 通过利用完整的信号信息,CVSR-Net在OCT超分辨率方面取得了重大进展.
  • 由于其概括能力,拟议的方法显示出生物医学成像中更广泛应用的潜力.