Abstract
We report a technique for quantitative three-dimensional (3D) mapping of refractive index in live cells and tissues using a phase-shifting laser interferometric microscope with variable illumination angle. We demonstrate tomographic imaging of cells and multicellular organisms, and time-dependent changes in cell structure. Our results will permit quantitative characterization of specimen-induced aberrations in high-resolution microscopy and have multiple applications in tissue light scattering.
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Acknowledgements
This work was funded by US National Institutes of Health (P41-RR02594-18) and Hamamatsu Corporation.
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W.C. and C.F.-Y. conducted the experimental setup, data acquisition and data analysis; S.O. contributed to the experimental setup; N.L. contributed to 3D visualization; W.C., C.F.-Y., K.B., R.R.D. and M.S.F. wrote the manuscript; M.S.F. supervised the project.
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The authors declare no competing financial interests.
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Supplementary Text and Figures
Supplementary Figures 1–4, Supplementary Methods, Supplementary Software (PDF 911 kb)
Supplementary Video 1
Animation of 3-D rendered index tomogram of a HeLa cell from Figure 2. (MOV 2460 kb)
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Choi, W., Fang-Yen, C., Badizadegan, K. et al. Tomographic phase microscopy. Nat Methods 4, 717–719 (2007). https://doi.org/10.1038/nmeth1078
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DOI: https://doi.org/10.1038/nmeth1078
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