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相关概念视频

Scanning Electron Microscopy01:07

Scanning Electron Microscopy

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A scanning electron microscope (SEM) is used to study the surface features of a sample by using an electron beam that scans the sample surface in a two-dimensional manner. Typically, areas between ~1 centimeter to 5 micrometers in width can be imaged. SEM can be used to image bacteria, viruses, tissues as well as larger samples like insects. Conventional SEM gives a magnification ranging from 20X to 30,000X and spatial resolution of 50 to 100 nanometers.
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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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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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Direct Comparison of Hyperspectral Stimulated Raman Scattering and Coherent Anti-Stokes Raman Scattering Microscopy for Chemical Imaging
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关于SICM扫描图像分辨率增强算法的研究

Zhenhua Quan1, Shilin Xu1, Xiaobo Liao1

  • 1School of Information Engineering, Southwest University of Science and Technology, Mianyang 621010, China.

Sensors (Basel, Switzerland)
|June 19, 2024
PubMed
概括
此摘要是机器生成的。

这项研究引入了一种新的算法,用于提高扫描离子导电显微镜 (SICM) 在高速扫描期间的成像分辨率. 该方法提高了活细胞成像的图像质量和时间分辨率.

关键词:
尼迪 (NEDI) 的意思是扫描成像 增强分辨率 扫描成像 增强分辨率扫描离子导电微镜扫描离子导电显微镜

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科学领域:

  • 生物物理学的生物物理.
  • 显微镜技术 显微镜技术
  • 图像处理 图像处理

背景情况:

  • 扫描离子导电显微镜 (SICM) 在生理条件下提供活生物样本的非侵入性3D成像.
  • 高速SICM成像面临着同时实现高时间和空间分辨率的挑战,通常会导致噪声和降低信号对噪声比.
  • 现有的方法难以平衡成像速度和分辨率,限制了动态细胞过程的研究.

研究的目的:

  • 在高速扫描条件下开发和验证SICM中增强图像分辨率的算法.
  • 解决复杂样品SICM成像中的时间和空间分辨率之间的权衡问题.
  • 在快速SICM扫描过程中改善信号噪声比和整体图像质量.

主要方法:

  • 预处理SICM图像与中位过以消除高速扫描中的盐和胡噪声.
  • 使用Canny边缘检测来识别图像目标边缘.
  • 应用混合插值策略:用于边缘的新边缘定向插值 (NEDI) 和非边缘区域的双线插值,以提高分辨率.

主要成果:

  • 与传统的2x分辨率成像相比,拟议的算法在480nm/ms的扫描速度下显著提高了60%的时间分辨率.
  • 扫描图像的峰值信号噪声比率 (PSNR) 提高了7dB.
  • 在成像关节软骨细胞中显示出0.97的高结构相似性 (SSIM),表明出色的真实性.

结论:

  • 开发的算法有效地减轻噪声,并提高高速SICM成像中的分辨率.
  • 这种进步克服了在快速扫描高分辨率样本时减少时间分辨率的局限性.
  • 拟议的方法大大提高了SICM用于动态生物成像的性能和适用性.