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Live Cell Refractometry Using Hilbert Phase Microscopy and Confocal Reflectance Microscopy

机译:使用希尔伯特相显微镜和共聚焦反射显微镜的活细胞验光

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摘要

Quantitative chemical analysis has served as a useful tool for understanding cellular metabolisms in biology. Among many physical properties used in chemical analysis, refractive index in particular has provided molecular concentration that is an important indicator for biological activities. In this report, we present a method of extracting full-field refractive index maps of live cells in their native states. We first record full-field optical thickness maps of living cells by Hilbert phase microscopy and then acquire physical thickness maps of the same cells using a custom-built confocal reflectance microscope. Full-field and axially averaged refractive index maps are acquired from the ratio of optical thickness to physical thickness. The accuracy of the axially averaged index measurement is 0.002. This approach can provide novel biological assays of label-free living cells in situ.
机译:定量化学分析已成为了解生物学中细胞代谢的有用工具。在化学分析中使用的许多物理特性中,折射率尤其提供了分子浓度,这是生物活性的重要指标。在此报告中,我们介绍了一种提取处于原始状态的活细胞的全场折射率图的方法。我们首先通过希尔伯特相显微镜记录活细胞的全视野光学厚度图,然后使用定制的共聚焦反射显微镜获得相同细胞的物理厚度图。从光学厚度与物理厚度之比获取全场和轴向平均折射率图。轴向平均折射率测量的精度为0.002。这种方法可以提供原位无标记活细胞的新型生物学测定。

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