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arXiv 1702.03582physics.bio-ph
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结构照明多模态三维分辨定量相位和荧光亚衍射显微术

Structured illumination multimodal 3D-resolved quantitative phase and fluorescence sub-diffraction microscopy

Shwetadwip Chowdhury, Will J. Eldridge, Adam Wax, Joseph A. Izatt

摘要:

亚衍射分辨率成像通过可视化关键但以前无法分辨的亚细胞结构在生物研究中发挥了关键作用。不幸的是,远场子衍射分辨率的应用目前分为荧光和相干衍射制度,和多模态子衍射技术,桥梁这一差距尚未得到证明。在这里,我们报告说,结构照明(SI)允许多模子衍射成像的相干定量相位(QP)和荧光。由于SI的常规荧光应用,我们首先展示了具有校准微球的SI使能的三维(3D)QP亚衍射成像的原理。图像分析证实了衍射限制QP成像的横向和轴向分辨率增强,并建立了相干SI和传统光学衍射断层扫描之间惊人的相似之处。接下来,我们介绍了一个光学系统,利用SI实现3D亚衍射,多模态QP/荧光可视化的A549生物细胞荧光标记的F-肌动蛋白。我们的研究结果表明,SI具有独特的效用,在研究具有重要的分子,生物物理和生物化学成分的生物现象。

英文摘要:

Sub-diffraction resolution imaging has played a pivotal role in biological research by visualizing key, but previously unresolvable, sub-cellular structures. Unfortunately, applications of far-field sub-diffraction resolution are currently divided between fluorescent and coherent-diffraction regimes, and a multimodal sub-diffraction technique that bridges this gap has not yet been demonstrated. Here we report that structured illumination (SI) allows multimodal sub-diffraction imaging of both coherent quantitative-phase (QP) and fluorescence. Due to the conventional fluorescent applications of SI, we first demonstrated the principle of SI-enabled three-dimensional (3D) QP sub-diffraction imaging with calibration microspheres. Image analysis confirmed enhanced lateral and axial resolutions over diffraction-limited QP imaging, and established striking parallels between coherent SI and conventional optical diffraction tomography. We next introduce an optical system utilizing SI to achieve 3D sub-diffraction, multimodal QP/fluorescent visualization of A549 biological cells fluorescently tagged for F-actin. Our results suggest that SI has unique utility in studying biological phenomena with significant molecular, biophysical, and biochemical components.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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