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相关概念视频

Total Internal Reflection Fluorescence Microscopy01:05

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Total internal reflection fluorescence microscopy or TIRF is an advanced microscopic technique used to visualize fluorophores in samples close to a solid surface with a higher refractive index, such as a glass coverslip. TIRF only allows fluorophores in proximity to the solid surface to be excited. When light from a medium with a lower refractive index (such as air) hits the glass coverslip at a critical angle, the light undergoes total internal reflection stead of passing through the glass.
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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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相关实验视频

Updated: Jun 12, 2025

Fluorescence Lifetime Macro Imager for Biomedical Applications
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Fluorescence Lifetime Macro Imager for Biomedical Applications

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光场断层扫描光终身成像显微镜.

Yayao Ma1, Jongchan Park1, Luzhe Huang1,2,3

  • 1Department of Bioengineering, University of California, Los Angeles, CA 90095.

Proceedings of the National Academy of Sciences of the United States of America
|September 25, 2024
PubMed
概括
此摘要是机器生成的。

我们开发了光场断层成像FLIM (LIFT-FLIM),这是一种计算成像技术,可以显著减少扫描步骤,以实现更快,高分辨率的3D光终身成像显微镜. 这一突破增强了分子水平的生物可视化.

关键词:
在3D成像中使用3D成像.光终身成像显微镜显微镜光场成像光场成像

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科学领域:

  • 生物光学和成像科学 生物光学和成像科学
  • 分子和细胞生物学分子和细胞生物学
  • 计算成像技术的成像

背景情况:

  • 光终身成像显微镜 (FLIM) 通过测量光衰变速率来在分子水平上可视化生物样本.
  • 传统的FLIM面临着长时间的采集时间和广泛的扫描,特别是3D成像方面的挑战.
  • 高分辨率的生命周期图对于理解分子相互作用和细胞环境至关重要.

研究的目的:

  • 开发一种计算成像技术,克服传统FLIM系统的局限性.
  • 为了能够更快,更有效地获取体积光寿命图像的数据.
  • 为了减少高分辨率3D FLIM的扫描要求.

主要方法:

  • 引入光场断层成像FLIM (LIFT-FLIM),一种新的计算成像方法.
  • 使用具有高时间带宽的低维探测器,以有效获取数据.
  • 使用线性单光子雪崩二极管阵列演示了LIFT-FLIM.

主要成果:

  • 与传统的FLIM方法相比,LIFT-FLIM显著减少了扫描步骤.
  • 实现了高数据效率的体积光寿命图像的获取.
  • 展示了无与伦比的单光子检测灵敏度和扩展到光谱FLIM的功能.
  • 应用LIFT-FLIM用于肺器官的高含量多重成像.

结论:

  • LIFT-FLIM为快速,高分辨率的3D光成像提供了强大的解决方案.
  • 该技术增强了生物系统中的分子水平可视化.
  • LIFT-FLIM具有很大的潜力,可以促进基础和转化生物医学研究.