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Proceedings Paper

Quantitative phase imaging-based refractive index determination of living cells using incorporated microspheres as reference
Author(s): Björn Kemper; Sabine Przibilla; Angelika Vollmer; Steffi Ketelhut; Gert von Bally
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Paper Abstract

In quantitative phase-based live cell imaging the intracellular refractive index represents an important parameter. On one hand decoupling of the refractive index and the cell thickness is required, e. g., for reliable investigations on the cell morphology. On the other hand the cell refractive index and its spatial distribution is related to the concentration of the intracellular content. We explored a method to determine the mean refractive index of the cytoplasm with digital holographic microscopy (DHM). Microspheres that have been incorporated by living cells are used as reference in quantitative DHM phase contrast images from which the refractive index is obtained by a two dimensional fitting procedure. As many cells show a phagocytic behavior the method may be used with a variety of different cell types. Furthermore, as no modification of the experimental setup is required, the principle prospects to be used with several existing quantitative phase contrast imaging techniques.

Paper Details

Date Published: 8 June 2011
PDF: 6 pages
Proc. SPIE 8086, Advanced Microscopy Techniques II, 808607 (8 June 2011);
Show Author Affiliations
Björn Kemper, Westfälische Wilhelms-Univ. Münster (Germany)
Sabine Przibilla, Westfälische Wilhelms-Univ. Münster (Germany)
Angelika Vollmer, Westfälische Wilhelms-Univ. Münster (Germany)
Steffi Ketelhut, Westfälische Wilhelms-Univ. Münster (Germany)
Gert von Bally, Westfälische Wilhelms-Univ. Münster (Germany)

Published in SPIE Proceedings Vol. 8086:
Advanced Microscopy Techniques II
Peter T. C. So; Emmanuel Beaurepaire, Editor(s)

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