An open-source code for Mie extinction extended multiplicative signal correction for infrared microscopy spectra of cells and tissues

Journal of Biophotonics
Johanne H SolheimAchim Kohler

Abstract

Infrared spectroscopy of single cells and tissue is affected by Mie scattering. During recent years, several methods have been proposed for retrieving pure absorbance spectra from such measurements, while currently no user-friendly version of the state-of-the-art algorithm is available. In this work, an open-source code for correcting highly scatter-distorted absorbance spectra of cells and tissues is presented, as well as several improvements of the latest version of the Mie correction algorithm based on extended multiplicative signal correction (EMSC) published by Konevskikh et al. In order to test the stability of the code, a set of apparent absorbance spectra was simulated. To this purpose, pure absorbance spectra based on a Matrigel spectrum are simulated. Scattering contributions where obtained by mimicking the scattering features observed in a set of experimentally obtained spectra . It can be concluded that the algorithm is not depending strongly on the reference spectrum used for initializing the algorithm and retrieves well the underlying pure absorbance spectrum. The calculation time of the algorithm is considerably improved with respect to the resonant Mie scattering EMSC algorithm used by the community today.

References

Jul 20, 2012·The Analyst·Miloš MiljkovićMax Diem
Oct 4, 2012·Applied Spectroscopy·Rohit Bhargava
Dec 12, 2012·Journal of Biophotonics·Angela Kallenbach-ThieltgesKlaus Gerwert
Apr 2, 2016·Faraday Discussions·Tatiana KonevskikhAchim Kohler
Dec 28, 2017·Analytical Chemistry·Tomasz P Wrobel, Rohit Bhargava

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Citations

Apr 17, 2020·Nature Communications·Slobodan SirovicaOwen Addison

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