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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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Total Internal Reflection Fluorescence Microscopy01:05

Total Internal Reflection Fluorescence Microscopy

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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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Protein Dynamics in Living Cells01:19

Protein Dynamics in Living Cells

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Different fluorescence-based techniques are used to study the protein dynamics in living cells. These techniques include FRAP, FRET, and PET.
Fluorescent recovery after photobleaching (FRAP) is a fluorescent-protein-based detection technique used to quantify protein movement rates within the cell. This method exposes a small portion of the cell to an intense laser beam. The laser beam causes permanent photobleaching of the fluorophore-tagged proteins in the exposed region. As the bleached...
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相关实验视频

Updated: Jun 16, 2025

Computed Tomography-guided Time-domain Diffuse Fluorescence Tomography in Small Animals for Localization of Cancer Biomarkers
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Computed Tomography-guided Time-domain Diffuse Fluorescence Tomography in Small Animals for Localization of Cancer Biomarkers

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多层学习增强的光扩散断层扫描在反射几何学.

Haitao Chen, Kaixian Liu, Yuxuan Jiang

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    概括
    此摘要是机器生成的。

    我们开发了反射几何学的多误差学习增强光扩散断层扫描 (MEL-rFDT),用于精确地3D定位深层静脉光探针. 这种方法提高了神经电路和瘤成像应用的准确性.

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    From Fast Fluorescence Imaging to Molecular Diffusion Law on Live Cell Membranes in a Commercial Microscope
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    Simultaneous Interference Reflection and Total Internal Reflection Fluorescence Microscopy for Imaging Dynamic Microtubules and Associated Proteins
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    相关实验视频

    Last Updated: Jun 16, 2025

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    From Fast Fluorescence Imaging to Molecular Diffusion Law on Live Cell Membranes in a Commercial Microscope
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    Simultaneous Interference Reflection and Total Internal Reflection Fluorescence Microscopy for Imaging Dynamic Microtubules and Associated Proteins
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    科学领域:

    • 生物医学光学 生物医学光学
    • 医疗成像医学成像
    • 神经科学是一个神经科学.

    背景情况:

    • 精确的3D定位内光探针对于理解神经回路和瘤动态至关重要.
    • 反射几何学的光扩散断层扫描 (rFDT) 能够进行深层组织成像,但在检测灵敏度和模型准确性方面面临挑战.
    • 组织异质性和光子传输变化扰乱了扩散路径,限制了当前rFDT的性能.

    研究的目的:

    • 开发一种新的方法,用于精确的3D定位和感应在亚厘米深度内内光探针.
    • 为了提高光扩散断层扫描在反射几何学的准确性和真实性.
    • 为了克服与检测灵敏度和光子传输扰动有关的当前rFDT方法的局限性.

    主要方法:

    • 引入了多错误学习增强的rFDT (MEL-rFDT),一种深度学习方法.
    • 从光子传输模型和空间注意力的嵌入物理先验到深度网络中.
    • 使用有限的样本训练网络,以适应性地弥补错误和依赖深度的灵敏度.

    主要成果:

    • 通过MEL-rFDT实现了内光探针的高保真重建.
    • 在老鼠的脑瘤和体内皮下瘤成像中证明了前所未有的3D定位和感知精度.
    • 在样本中展示了体积和功能概括.

    结论:

    • MEL-rFDT显著提高了3D定位和传感器的精度,用于静脉内光探针.
    • 该方法的适应性错误补偿和灵敏度校正使得可靠的深层组织成像成为可能.
    • 促进了手术内病理学,动态成像和临床决策方面的进步.